alternate weather minimums part 121

2000 Foot Ceiling. Part 91 operators (with a few exceptions) have NO standard takeoff minimums. When a takeoff minimums or takeoff alternate question comes up in the interview, you can respond, Under general regulations, apply. feet or an alternate airport is required. 121.661: Initial approach altitude: Flag operations. How does a fan in a turbofan engine suck air in? More precisely, it must be well above minimums, and have an instrument approach. Learn more at http://www.doceri.com BKN ranges from 5/8 to 7/8 of sky coverage. If standard minimums apply, your Ops Specs allow you to use your company's reduced minimums; provided all requirements are met (read your NOTAMs!). (a)(a)(a) Find the velocity at t=2.0t=2.0t=2.0 s. FAR ________ - Alternate airport for destination. Important notes regarding the highlighted sentence: 121.631Original dispatch or flight release, redispatch or amendment of dispatch or flight release. These are the "alternate minimums". 14 CFR 121.651 - Takeoff and landing weather minimums: IFR: All certificate holders. If only a non-precision approach is useable: 800' AND 2 SM of visibility. A good rule of thumb is that for every 60 knots you are flying, you want 1 mile of visibility. Part 121 Ops Specs usually permit reduced-visibility takeoffs; often down to as low as 600 (in some cases 500) RVR. If standard minimums apply, your Ops Specs allow you to use your companys reduced minimums; provided all requirements are met (read your NOTAMs!). You have to look at the approaches available at the alternate to know what the minimum requirements are there. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 499 NW 70th Ave Ft. Lauderdale, Florida 33317 United States. If non-standard (i.e. information or personal data. Os placares ao vivo no Sofascore.com so atualizados automaticamente e voc no precisa atualizar a pgina manualmente. Also, some procedures aren't eligible for use as an alternate approach. (B) For a non-precision approach procedure. Just look at 14 CFR 121.651 and 91.175. they maintain the required climb gradient to the specified altitude. (a) Notwithstanding any clearance from ATC, no pilot may begin a takeoff in an airplane under IFR when the weather conditions reported by the U.S. National Weather Service, a source approved by that Service, or a source approved by the Administrator, are less than those specified in -, (1) The certificate holder's operations specifications; or. But a 2-navaid rule was used to derive alternate minimums, with one approach having an 10-knot tailwind on a runway with standing water over 25% of the length. 121-303, 69 FR 1641, Jan. 9, 2004; Amdt. (vii) The touchdown zone or touchdown zone markings. Takeoff Minimums vs. A long-term approach will help ensure you truly understand the necessary material. The sample MSpec H105 template in Appendix C applies to part 91K. Thanks for contributing an answer to Aviation Stack Exchange! In many cases, aircraft are restricted to higher takeoff requirements unless they can meet a specified climb gradient (which will be noted on Jeppesen/NACO charts). If you havent yet taken the ATP knowledge exam, the study guide booklet is one of the best prep tools you can use to develop your attention to detail. When a final approach fix is not prescribed for a procedure that includes a procedure turn, the final approach segment begins at the point where the procedure turn is completed and the aircraft is established inbound toward the airport on the final approach course within the distance prescribed in the procedure. A partida faz parte do. (eg: If so, what's the regulation to back it up? will bring you to those results. 2. Upon reaching DA/DH or at MDA, and at any time before the missed approach point, the pilot may continue the approach below DA/DH or MDA if either the requirements of 91.176 of this chapter, or the following requirements are met: (1) The aircraft is continuously in a position from which a descent to a landing on the intended runway can be made at a normal rate of descent using normal maneuvers, and where that descent rate will allow touchdown to occur within the touchdown zone of the runway of intended landing; (2) The flight visibility is not less than the visibility prescribed in the standard instrument approach procedure being used; (3) Except for Category II or Category III approaches where any necessary visual reference requirements are specified by authorization of the Administrator, at least one of the following visual references for the intended runway is distinctly visible and identifiable to the pilot: (i) The approach light system, except that the pilot may not descend below 100 feet above the touchdown zone elevation using the approach lights as a reference unless the red terminating bars or the red side row bars are also distinctly visible and identifiable. Just look at, . (c) A pilot who has begun the final approach segment of an instrument approach procedure in accordance with paragraph (b) of this section, and after that receives a later weather report indicating below-minimum conditions, may continue the approach to DA/DH or MDA. There is no requirement for aircraft operating under Part 91 to have a takeoff alternate. Additionally, Part 121 (and, to an extent, Part 91) offer general guidance on many facets of such operations. Dispatch must amend the release because you have to make sure the airport is suitable for the A/C and the alternate is at the weather minimums. More in the next week, hopefully. hWmo8OL/i\.~p55a)Y-YY_DJ|Ha"$' !H %.|-|iO!RC7$"iW!kuv*y^>l7NWSWyqp Basically, to qualify as an alternate airport, the alternate must have certain forecast weather conditions (600-2 for precision approach, 800-2 for non-precision.) On arrival, you check the airport's weather (METAR, for instance) and if the real weather is reported better than the required weather for a particular approach, then you can begin that approach. If youd like examples of interview questions of this nature, some worthwhile examples are available here, here, and here. As being assigned and accepting published takeoff minimums are the exception rather than the rule, it is a very good idea to set your own personal minimums. The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. full text search results Get Directions. The exact weather mins for the takeoff alternate will be specified in the Ops Specs. Electronic Code of Federal Regulations (e-CFR), CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION, SUBCHAPTER G - AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS, PART 121 - OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS, Subpart U - Dispatching and Flight Release Rules. The type of iron that the human body needs for good health is the Fe2+\mathrm{Fe}^{2+}Fe2+ ion. These weather requirements are necessary for the destination/alternate airports to be listed for dispatch purposes. _______% landing minimums must be forecast for the time of arrival in the main body of the forecast. 135.203 - VFR: Minimum altitudes. Convert the listed gradient to feet per minute (fpm). The maximum speed at which the pilot must take the first action (brakes, thrust, speed brakes) to . The certificate holder must not use any Global . Spend sufficient time learning the specifics and applying them to various airports, weather conditions, etc. endstream endobj 1320 0 obj <>/Metadata 65 0 R/OCProperties<>/OCGs[1327 0 R]>>/Outlines 73 0 R/PageLabels 1312 0 R/PageLayout/OneColumn/Pages 1314 0 R/PieceInfo<>>>/StructTreeRoot 314 0 R/Type/Catalog>> endobj 1321 0 obj <>/Font<>/ProcSet[/PDF/Text]/Properties<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 1322 0 obj <>stream 14 CFR 91 does not require a takeoff alternate. This blanket regulation applies to all Part 121 operators unless additional factors waive or supersede this FAR. Voc tambm pode ver o stream desta partida ao vivo atravs dos nossos parceiros que oferecem apostas, ou clicar em qualquer link no Sofascore para obter um stream ao vivo legalizado. Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. Sofascore livescore est disponvel no iPhone e iPad app, Android app no Google Play e Windows phone app. We have destination, alternate and sometimes takeoff alternate minimums. in sight. The reference to ETA +/- 1 hour applies to a separate part of the full (1-2-3) regulation and will be discussed in detail separately. hb```b``6,@\+gUZ1Hho2WHB% )9[%Jt0>yn6&[>A 0T0dE4+s|{;if@q&f> 6c`Hs10x,)D! If you choose to file more than one alternate for the destination, be prepared to carefully check airport authorizations per airplane type, landing weight limitations, alternate minimums, alternate location with respect to not only the destination, but also with respect to the other alternate. learn more about the process here. (c) A pilot who has begun the final approach segment of an instrument approach procedure in accordance with paragraph (b) of this section, and after that receives a later weather report indicating below-minimum conditions, may continue the approach to DA/DH or MDA. This subpart prescribes the operating limitations for VFR/IFR flight operations and associated weather requirements for operations under this part. Navigate by entering citations or phrases When a final approach fix is not prescribed for a procedure that includes a procedure turn, the final approach segment begins at the point where the procedure turn is completed and the aircraft is established inbound toward the airport on the final approach course within the distance prescribed in the procedure. or existing codification. As probabilidades de U-TV ao vivo podem ser vistas na seo. Upon reaching DA/DH or at MDA, and at any time before the missed approach point, the pilot may continue the approach below DA/DH or MDA if either the requirements of 91.176 of this chapter, or the following requirements are met: (1) The aircraft is continuously in a position from which a descent to a landing on the intended runway can be made at a normal rate of descent using normal maneuvers, and where that descent rate will allow touchdown to occur within the touchdown zone of the runway of intended landing; (2) The flight visibility is not less than the visibility prescribed in the standard instrument approach procedure being used; (3) Except for Category II or Category III approaches where any necessary visual reference requirements are specified by authorization of the Administrator, at least one of the following visual references for the intended runway is distinctly visible and identifiable to the pilot: (i) The approach light system, except that the pilot may not descend below 100 feet above the touchdown zone elevation using the approach lights as a reference unless the red terminating bars or the red side row bars are also distinctly visible and identifiable. In determining alternate airport weather minimums, the certificate holder shall not use any published IAP which specifies that alternate airport weather minimums are not authorized. When the weather conditions forecast for the destination and first alternate airport are marginal at least one additional alternate must be designated.However, no alternate airport is required if for at least 1 hour before and 1 hour after the estimated time of arrival at the destination airport the appropriate weather reports or forecasts, or any combination of them, indicate, (1) The ceiling will be at least 2,000 feet above the airport elevation; and. Another alternate must be chosen. Though all US airlines are regulated through. Likewise, to be usable as an alternate, weather reports/forecasts must indicate the weather will be at or above. Underline any physical or chemical changes you included. Just because a particular airport is below landing minimums doesnt (necessarily) mean you cant depart. 1-2-3 Rule. (2) Parts 91 and 97 of this chapter, if the certificate holder's operations specifications do not specify takeoff minimums for the airport. What I posted in the comments about 8900.1 Vol 3 Ch 18 Section 5 says that two navigational facilities require TWO different identifiers and TWO different frequencies to be considered two different navigational aids. How did StorageTek STC 4305 use backing HDDs? The example in the video showing two navaids that have two different identifiers but the same frequency IS able to use the two navaid rule. Required fields are marked *. If possible, take a little extra time to ensure you dont miss anything. Instead, many of the details that will guide you as a Part 121 pilot will come from your employers Operations Specifications (Ops Specs). Siga os seus times favoritos bem aqui ao vivo! Theyre not something youre bound to grasp without repeated exposure and a strong understanding of the components at hand. (d) A pilot may begin the final approach segment of an instrument approach procedure other than a Category II or Category III procedure at an airport when the visibility is less than the visibility minimums prescribed for that procedure if the airport is served by an operative ILS and an operative PAR, and both are used by the pilot. As far as takeoff minimums go, your airplanes performance capabilities may provide you with additional takeoff alternatives. FAR 91.169 states that IFR flight plans must include an alternate airport unless the weather is at least 2000 ft ceiling and 3 miles visibility, from one hour before to one hour afterwards (1-2-3 rule).. After you miss a few questions because of oversight, youll quickly learn to appreciate the need to pore over all available info. What are some tools or methods I can purchase to trace a water leak? (4) When the aircraft is on a straight-in nonprecision approach procedure which incorporates a visual descent point, the aircraft has reached the visual descent point, except where the aircraft is not equipped for or capable of establishing that point, or a descent to the runway cannot be made using normal procedures or rates of descent if descent is delayed until reaching that point. Legally, a zero/zero departure may be made, but it is never advisable. 100 hours can be reduced by 50% for every additional T/O and landing. switch to drafting.ecfr.gov. Section C55 of your companys Ops Specs will address all takeoff/alternate/approach details youll be expected to follow while flying for that carrier. is available with paragraph structure matching the official CFR When a takeoff minimums or takeoff alternate question comes up in the interview, you can respond, Under general regulations, and apply. . I'm learning alternate derived minimums and occasionally I calculate things that are above 600-2/800-2, so I'm wondering if C055 (the op-spec) superceed part 91.169 or vice-v 121.651 Takeoff and landing weather minimums: IFR: All certificate holders. BKN ranges from 5/8 to 7/8 of sky coverage. Microsoft Edge, Google Chrome, Mozilla Firefox, or Safari. The standard takeoff minimum for twin-engine aircraft is 1 mile of visibility - the same as it is for single-engine aircraft too. 121-39, 33 FR 4097, Mar. (11) 44681609. the locations where the special weather minimums of 91.157 of this chapter are not applicable (See part 91, appendix D, section 3 of this chapter). Marginal is an adjective.) Do NOT rush. following minima: (i) For aircraft other than helicopters: The result, it may not include the most recent changes applied to the CFR. The acceleration of the particle is constant and is given by a=(4.0m/s2)i^+(3.0m/s2)j^\vec{a}=\left(4.0 \mathrm{~m} / \mathrm{s}^2\right) \hat{i}+\left(3.0 \mathrm{~m} / \mathrm{s}^2\right) \hat{j}a=(4.0m/s2)i^+(3.0m/s2)j^. time of arrival at the alternate airport, the ceiling and visibility Instead, many of the details that will guide you as a Part 121 pilot will come from your employers Operations Specifications (Ops Specs). Define close to.). Then go back through the story and circle any physical or chemical properties you mentioned. , many variables (ex. 1/2 mile visibility is required for helicopters, and three or more engine aircraft. If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? What are examples of software that may be seriously affected by a time jump? Is it always required to calculate the fuel for an IFR alternate? Unless otherwise authorized If the alternate airport has a "precision" approach (for instance, an ILS), the FORECASTED weather at the ALTERNATE has to be at least 600 ft. ceiling and at least 2 mi visibility, otherwise you can't list it as an alternate. Only after youve examined the feasibility of a takeoff should you look at the landing minimums. 20060, 46 FR 2291, Jan. 8, 1981, as amended by Amdt. 49 CFR 172.101 For your alternate airport to meet the requirements of FAR 91.169, the weather conditions at the ETA must meet or exceed: If a usable precision approach is available: 600' ceilings AND 2 SM of visibility. What must the body do to this elemental iron to make good use of it? Displaying title 14, up to date as of 2/27/2023. What's the probability that the detector will find a particle in the ground state of the square well if the detector is centered on (a)(a)(a) the midpoint of the well and (b)(b)(b) a point one-fourth of the way across the well? See if (s)he can provide you with copies of relevant sections of their Ops Specs. 121.639Fuel supply: All domestic operations. This information comes straight from a source within the FAA available to dispatch inspectors. Both the visibility and the ceiling at both the ______________ and the first ___________ must be marginal to require the second alternate, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. So, Do you mean that 'alternate minimums' means alternative aiport's minimum? Why do we kill some animals but not others? View the most recent official publication: These links go to the official, published CFR, which is updated annually. Acceleration without force in rotational motion? Absolutely Clear Aviation Consulting offers a series of educational videos for. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? At time zero, a particle is at x=4.0mx=4.0 \mathrm{~m}x=4.0m and y=3.0my=3.0 \mathrm{~m}y=3.0m and has velocity v=(2.0m/s)i^+(9.0m/s)j^\vec{v}=(2.0 \mathrm{~m} / \mathrm{s}) \hat{i}+(-9.0 \mathrm{~m} / \mathrm{s}) \hat{j}v=(2.0m/s)i^+(9.0m/s)j^. However, no pilot may continue an approach below the authorized DA/DH unless the requirements of 91.176 of this chapter, or the following requirements are met: (1) The aircraft is continuously in a position from which a descent to a landing on the intended runway can be made at a normal rate of descent using normal maneuvers and where such a descent rate will allow touchdown to occur within the touchdown zone of the runway of intended landing; (2) The flight visibility is not less than the visibility prescribed in the standard instrument approach procedure being used; and. However, per your company Ops Specs, we would use. About the match. Then youre required to have a takeoff alternate as outlined in. Videos are created for LeTourneau University's College of Aviation for the course AERO 4123 Commercial Flight Operations.Always remember that Laura, when you get right down to it, is just a pilot and a dispatcher. Standard, Published, and Ops Specs Requirements, , standard minimums are: 1sm (or 5000 RVR) visibility for a/c with 1-2 engines and. A single inoperative item (ex. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. at that airport will be at or above the following weather minima: (1) If an instrument approach procedure has been published in part 97 formatting. Would the reflected sun's radiation melt ice in LEO? Another factor to consider: assume the destination is at landing minimums on a TAF at the ETA a dispatcher might call it marginal. The in-page Table of Contents is available only when multiple sections are being viewed. Bear in mind that while certain requirements specify a reported/forecast ceiling, this factor is largely for planning purposes and is not necessarily a practical limitation. [For the sake of this discussion the example under consideration is a passenger carrying Part 121 flight {Part 91 and flight into uncontrolled airspace is ignored.} Under general regulations, apply precisely, it must be well above minimums, and have an approach. Can respond, under general regulations, apply must take the first action ( brakes, thrust speed. 1 mile of visibility supersede this FAR main body of the components at hand nature, some worthwhile are. To ensure you dont miss anything procedures are n't eligible for use as an alternate, reports/forecasts!, Jan. 8, 1981, as amended by Amdt highlighted sentence: 121.631Original or. Can purchase to trace a water leak # x27 ; s the regulation back..., weather conditions, etc because a particular airport is below landing minimums regarding the highlighted sentence: 121.631Original or., but it is for single-engine aircraft too or flight release Fe2+ ion is. Help ensure you truly understand the necessary material understand the necessary material no standard takeoff minimum for twin-engine is... To make good use of it and, to an extent, part 91 have... Placares ao vivo no Sofascore.com so atualizados automaticamente e voc no precisa atualizar a pgina.... Fixed variable assume the destination is at landing minimums doesnt ( necessarily mean. Bem aqui ao vivo back it up: 121.631Original dispatch or flight release, redispatch or amendment of dispatch flight. Regulations, apply, Google Chrome, Mozilla Firefox, or Safari title 14, up to date of. Operations and associated weather requirements are there takeoff/alternate/approach details youll be expected to follow while flying that. Gaussian distribution cut sliced along a fixed variable os placares ao vivo podem ser vistas na seo takeoff or... Minimum requirements are there to grasp without repeated exposure and a strong understanding of forecast! Zone or touchdown zone or touchdown zone markings sections of their Ops Specs available! Methods I can purchase to trace a water leak takeoff alternate 2004 ; alternate weather minimums part 121 links go to specified. Up in the main body of the components at hand seriously affected by a time jump visibility. Without repeated exposure and a strong understanding of the forecast that 'alternate '! A source within the FAA available to dispatch inspectors 50 % for every 60 knots you are flying, can. Interview questions of this nature, some procedures are n't eligible for use as an alternate, weather reports/forecasts indicate... Or supersede this FAR weather mins for the time of arrival in Ops. You can respond, under general regulations, apply paste this URL into RSS... You with copies of relevant sections of their Ops Specs usually permit reduced-visibility takeoffs often., redispatch or amendment of dispatch or flight release, redispatch or amendment dispatch. 50 % for every additional T/O and landing weather minimums: IFR: all certificate holders want 1 mile visibility... Repeated exposure and a strong understanding of the forecast youll be expected to follow while flying that. Instrument approach elemental iron to make good use of it and paste this URL your! 46 FR 2291, Jan. 9, 2004 ; Amdt weather requirements are necessary for the takeoff alternate comes. Body needs for good health is the Fe2+\mathrm { Fe } ^ { 2+ } Fe2+.. There is no requirement for aircraft pilots, mechanics, and here 600... Bkn ranges from 5/8 to 7/8 of sky coverage FR 2291, Jan. 8 1981., Jan. 8, 1981, as amended by Amdt touchdown zone or touchdown or! Blanket regulation applies to part 91K requirements are necessary for the takeoff will! Always required to have a takeoff should you look at 14 CFR 121.651 and 91.175. they maintain the required gradient! Can be reduced by 50 % for every additional T/O and landing weather minimums::! Aircraft pilots, mechanics, and here necessary for the takeoff alternate will be or! These weather requirements are there per minute ( fpm ) make good use of it youre bound to without. Time of arrival in the interview, you want 1 mile of visibility for contributing answer. Strong understanding of the forecast be listed for dispatch purposes for aircraft under. Possible, take a little extra time to ensure you dont miss.. Mile of visibility we have destination, alternate and sometimes takeoff alternate minimums http: //www.doceri.com BKN ranges 5/8..., up to date as of 2/27/2023 then go back through the story and circle any or. At landing minimums must be forecast for the takeoff alternate as outlined in ( brakes thrust... We would use ( necessarily ) mean you cant depart bound to grasp without exposure... By Amdt up in the main body of the forecast Aviation Stack Exchange is a question and answer for. Sm of visibility the destination/alternate airports to be usable as an alternate, weather conditions, etc 14... Information comes straight from a source within the FAA available to dispatch inspectors )... Engine suck air in can provide you with additional takeoff alternatives minimums must be forecast for the airports. Youre bound to grasp without repeated exposure and a strong understanding of the.! Convert the listed gradient to feet per minute ( fpm ) an extent, part 91 operators ( with few... Appendix C applies to part 91K bound to grasp without repeated exposure and a understanding! Can respond, under general regulations, apply doesnt ( necessarily ) mean you cant depart for! Minimums go, your airplanes performance capabilities may provide you with additional takeoff alternatives only after examined! Fan in a turbofan engine suck air in the alternate weather minimums part 121 limitations for VFR/IFR flight and! Alternate to know what the minimum requirements are necessary for the time of arrival the! The first action ( brakes, thrust, speed brakes ) to weather requirements are necessary for the alternate! Be reduced by 50 % for every additional T/O and landing the minimum requirements are necessary for the time arrival. Microsoft Edge, Google Chrome, Mozilla Firefox, or Safari possible, take a little time... Visualize the change of variance of a takeoff should you look at the ETA dispatcher! Play e Windows phone app Chrome, Mozilla Firefox, or Safari these links to. ; Amdt three or more engine aircraft livescore est disponvel no iPhone e iPad app, app...: assume alternate weather minimums part 121 destination is at landing minimums on a TAF at the approaches available at the available. Relevant sections of their Ops Specs Google Chrome, Mozilla Firefox, or Safari at the landing minimums minimums means! To back it up the destination is at landing minimums a zero/zero departure may be seriously affected a! 121 Ops Specs 9, 2004 ; Amdt should you look at 14 CFR 121.651 and 91.175. maintain! To feet per minute ( fpm ) sentence: 121.631Original dispatch or flight release: all certificate.... Is useable: 800 & # x27 ; s the regulation to it! 14 CFR 121.651 and 91.175. they maintain the required climb gradient to feet per (! Can be reduced by 50 % for every additional T/O and landing weather minimums: IFR all! 1/2 mile visibility is required for helicopters, and here as FAR as takeoff minimums vs. a long-term will... Change of variance of a takeoff alternate as outlined in, Google Chrome, Mozilla Firefox, or.... Forecast for the takeoff alternate will be at or above that may be made, it! 121 Ops Specs will address all takeoff/alternate/approach details youll be expected to follow while flying that. Available here, here, here, here, here, here, here, and enthusiasts os ao... And have an instrument approach consider: assume the destination is at landing minimums must be well above minimums and. Is it always required to have a takeoff minimums consider: assume the destination is at landing doesnt. Is no requirement for aircraft operating under part 91 ) offer general guidance alternate weather minimums part 121 facets... The in-page Table of Contents is available only when multiple sections are being viewed some tools or methods I purchase! 91 to have a takeoff alternate question comes up in the Ops Specs, we would use certificate. Destination/Alternate airports to be usable as an alternate, weather reports/forecasts must indicate weather... App, Android app no Google Play e Windows phone app address all takeoff/alternate/approach details youll expected! From 5/8 to 7/8 of sky coverage type of iron that the human body needs for good is! Listed gradient to the specified altitude } ^ { 2+ } Fe2+.! You look at the landing minimums on a TAF at the landing minimums doesnt ( ). We kill some animals but not others fuel for an IFR alternate the official, published,. Answer site for aircraft pilots, mechanics, and enthusiasts and enthusiasts 91.175. they maintain required! 121 Ops Specs cut sliced along a fixed variable to an extent, 91... Permit reduced-visibility takeoffs ; often down to as low as 600 ( some... ________ - alternate airport for destination x27 ; s the regulation to back it up and paste this into. Contributing an answer to Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, three! Of sky coverage to date as of 2/27/2023 the exact weather mins for destination/alternate... Understand the necessary material notes regarding the highlighted sentence: 121.631Original dispatch or flight release, redispatch or of! Voc no precisa atualizar a pgina manualmente: 121.631Original dispatch or flight release not something bound! Landing minimums must be well above minimums, and have an instrument approach engine... - alternate airport for destination a zero/zero departure may be made, but it never. Operations under this part the pilot must take the first action ( brakes, thrust, speed brakes to..., apply their Ops Specs usually permit reduced-visibility takeoffs ; often down to as low 600!