However, the aircraft which we have today are tied to large, `` soft '' airfields.

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, 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, 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, one must expect that vaporization and ejection of material by hypervelocity impacts would cause a deviation from a linear relationship.

However, many herpetologists remain skeptical and would prefer a tentative maximum of about 30 feet.

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, this would require a lengthening of the season from thirteen to fourteen weeks.

However, three of the managers did say that they would agree to attend the proposed meeting if all of the other managers decided to attend.

However, it would require all data transmission to send eight bits when seven could suffice.

However, the Greeks thought of the two qualities as complementary: the two gods are brothers, and when Apollo at winter left for Hyperborea, he would leave the Delphic oracle to Dionysus.

However, with an international language with wide variations in its dialects, such as English, it would be impossible to represent the language in all its variations with a single phonetic alphabet.

However, many would disagree with this hypothesis ; in fact, many of the popular mouthwashes contain sodium lauryl sulfate as an ingredient ( e. g., Listerine Total Care ).

However Abdul is a common Arabic prefix meaning " Servant of the " and " Al " is Arabic for " the ", and if " hazra " means " he prohibited ", " he fenced in " or " Great Lord ", then the name would mean " Servant of the Prohibited ", " Servant of the Fenced in ", or " Servant of the Great Lord " which would make sense considering his role, even if it is not a proper Arabic name.

However, when forced to choose between Poirot and his wife in that novel, he initially chooses to betray Poirot to the Big Four so that they would not torture and kill his wife.

However, in general, the books only feature mental battles when there is some reason for mind-to-mind contact ( for example, Trump contact ) and magic or Trump is involved in all three of the above conflicts, so it is not clear whether Zelazny intended his characters to have such a power ; the combination of Brand's " living trump " powers and his high Psyche ( as presented in the roleplaying game ) would have guaranteed him victory over Corwin.

However, it would have been very slow.

However, many important and interesting operations are non-associative ; one common example would be the vector cross product.

However, using pure mass to resist the forces of a storm only works well as a permanent mooring ; a large enough rock would be nearly impossible to move to a new location.

However, at the base of this crack is a round void called an ampulla which would have functioned to distribute force over a larger surface area, hindering the ability of the " crack " formed by the serration to propagate through the tooth.

However, his mother consolidated the Doukas family connection by arranging the Emperor's marriage to Irene Doukaina, granddaughter of the Caesar John Doukas, the uncle of Michael VII, who would not have supported Alexios otherwise.

However we are told by Longinus that Ammonius wrote nothing, and if Ammonius was the principal influence on Plotinus, then it is unlikely that Ammonius would have been a Christian.

However, Buddha said that the purity of his heart was so great that, " Should Ananda die without being fully liberated ; he would be king of the gods seven times because of the purity of his heart, or be king of the Indian subcontinent seven times.

However, he supposedly surrendered both of these out of a fear that they would hinder his search for knowledge.

However, he thinks that these too occur out of necessity since an outside observer can see the same regularity that he would in a purely physical system.