However, even without the order of the captain, any member of crew or passenger, can take reasonable measures, when he or she has reasonable grounds to believe that such action is necessary to protect the safety of the aircraft, or of people or property therein.

However, the Luftwaffe also provided volunteers to Spain to test both tactics and aircraft in combat, including the first combat use of the Stuka.

However, the Western Allies ' air-to-ground aircraft were so greatly feared out of proportion to their actual tactical success, that following the lead up to Operation Overlord German vehicle crews showed reluctance to move en masse during daylight.

However, since piston-engined aircraft rely upon magnetos to provide spark to their cylinders rather than a battery powered ignition coil system, this theory is not strongly convincing.

However, carriers have been called upon to be first responders even when conventional land based aircraft were employed.

However, World War II delayed car production with efforts shifted to the construction of vehicle bodies, field guns, aircraft and engines.

However, any aircraft operating under VFR must have the required equipment on board, as described in FAR Part 91. 205 ( which includes instruments necessary for IFR flight ); but the view outside of the aircraft is the primary source for keeping the aircraft straight and level ( orientation ), flying where you intended to fly ( navigation ), and for not hitting anything ( separation ).

However, there are still minimum weather conditions that must be present in order for the aircraft to take off and land ; these will vary according to the kind of operation, the type of navigation aids available, the location and height of terrain and obstructions in the vicinity of the airport, equipment on the aircraft, and the qualifications of the crew.

However, they explained at a meeting of the Reich Industrial Council on 18 September 1941 that the new next generation aircraft had failed to materialise, and obsolescent types had to be continued to keep up with the growing need for replacements.

However, when an aircraft is climbing, descending, or banking in a turn the lift is tilted with respect to the vertical.

However, beginning with its separation from the Army in 1996, the Air Force has been downsizing ; it now has a strength of approximately 270 fixed-and rotary-wing aircraft, and is moving towards a smaller, more professional force.

However, the 1960 shootdown of a CIA U-2 by an SA-2 Guideline surface-to-air missile ( SAM ) while on a clandestine reconnaissance mission over the Soviet Union suddenly complicated the introduction of these new aircraft.

However, compared to a turbojet ( which can fly at high altitude for enhanced speed and fuel efficiency ) a propeller aircraft has a much lower ceiling.

However, pilots and aircraft do not need to be IFR rated to fly in CVFR areas, which is highly advantageous.

However, the real challenge in aviation is producing FAA-certified alternatives to the standard reciprocating engines that power most small general aviation aircraft.

However, at particularly busy airports, or airports with other special requirements, there is an air traffic control ( ATC ) system whereby controllers ( usually ground-based ) direct aircraft movements via radio or other communications links.

However, apart from sea transport, mosquitoes have been effectively carried by personal vehicles, delivery trucks, trains and aircraft.

However, instead of comparing engine performance, the gross aircraft performance as complete systems can be compared using first principle definitions of power, force and work with the requisite considerations of constantly changing effects like drag and the mass ( of the fuel ) in both systems.

However, he is best remembered for his work on a series of racing aircraft, which culminated in the Supermarine S. 6B, and the famous Supermarine Spitfire fighter.

However, aircraft commonly use heading indicators or directional gyros, which are not gyrocompasses and do not position themselves to north via precession, but are periodically aligned manually to magnetic north.

However, with the development of aircraft like the Convair B-36, both sides were gaining a greater ability to deliver nuclear weapons into the interior of the opposing country.

However, just as all the buildings have not fallen and flowed back to their original mud, so the values which wanted them and saw that they were built have not all disappeared.

However, it was not of innocence in general that I was speaking, but of perhaps the frailest and surely the least important side of it which is innocence in romantic love.

However, it seems axiomatic that the government has an obligation `` to exercise its mandate reasonably, equitably and with full regard for the disruptions which it inevitably causes ''.

However, last night the tapes were not run at all during the evening hours and all we got on TV were a few snatches which Douglas Edwards and Huntley and Brinkley could squeeze into their programs.

However, only Illinois, Oregon, Louisiana and Rhode Island have a situation in which the sundry units of government vary widely in relation to fiscal uniformity.

However, the surface temperature gradient can produce erroneous vapor-pressure measurements for the bulk liquid helium unless precautions are taken to isolate the tube ( which passes through the surface to the vapor pressure bulb ) from the liquid helium surface.

However, in this case as elsewhere it was necessary to arrive at a single standard to be applied to all situations, representing an averaging of conditions, and thus to fix particular points in time which would be considered the dividing points between daytime and nighttime conditions.

However, because this vulnerability is mutual, it is to the advantage of neither side to destroy the opponent's cities, at least so long as the opponent has nuclear weapons with which to effect reprisal.

However, they do demonstrate the presence of large normal pressures in the presence of flat shear fields which were forecast by the theory in the first part of the paper.

However, any oxygen nonequivalence would shorten either the already extremely short Af interlayer distance of 2.55 A or the non-hydrogen-bonded Af interlayer interactions which are already quite short at 2.58 Aj.

However, because of Church laws, lately more stringently enforced, which forbid the marriage of cousins closely related consanguineously, a means of facilitating the goal of in-group relations may be that of recourse to illegitimate unions.

However, the regionally differentiated results, which appear below in tables, are interesting evidence of the problems of developing self-government under even the most favorable circumstances.

However, if Federal funds are used, it would be entirely appropriate to train workers for jobs which could be obtained elsewhere as well as for jobs in the area of chronic unemployment.

However, the monetary authorities will continue to be required to pay attention to the consequences of their actions with respect to our international balance of payments position and the outflow of gold, as well as with regard to avoiding the creation of excessive liquidity in the economy, which would delay the effectiveness of monetary policy measures in the next expansion phase of the business cycle.

However, in the actual assessment of the cutting force by instrumental methods for any thickness of coating a number of spurious effects occur which must be taken into account and which make the measured value larger than the true cutting force indicated by eqn. ( 1 ).

However, the confession, which was the only evidence against him, was retracted before the trial.

In a long commentary which he has inserted in the published text of the first act of the play, he says at one point: `` However, that experience never raised a doubt in his mind as to the reality of the underworld or the existence of Lucifer's many-faced lieutenants.

However, the wei books were also destroyed in a series of Orthodox Confucian purges which culminated in a final proscription in 605.

However well chosen and cleverly arranged, such memorabilia unfortunately amounted to more of an interruption than an auxiliary to the evening's main business, which ( considering the talent at hand ) should probably have been the gathering of fresh samples of the Chicago style.

However, i ' thar is also still an Islamic ideal to which all Muslims should strive to adhere at all times.

However, while Apollo has a great number of appellations in Greek myth, only a few occur in Latin literature, chief among them Phoebus ( ; Φοίβος, Phoibos, literally " radiant "), which was very commonly used by both the Greeks and Romans in Apollo's role as the god of light.

However, the Greek tradition is referring to the existence of vapours and chewing of laurel-leaves, which seem to be confirmed by recent studies.

However, this story may reflect a cultural influence which had the reverse direction: Hittite cuneiform texts mention a Minor Asian god called Appaliunas or Apalunas in connection with the city of Wilusa attested in Hittite inscriptions, which is now generally regarded as being identical with the Greek Ilion by most scholars.