An airplane wants a vessel to change course and proceed towards a vessel in distress. The actions of the aircraft to convey this message will NOT include（）.

A . apparent wind speed only B . true wind speed and true wind direction C . true wind speed only D . apparent wind speed and true wind directio

A . Empty double-bottoms and lower holds，and a heavy deck cargo B . Flooding the forepeak to correct the vessel's trim C . Having KG smaller than KM D . Having a small positive righting arm

A . righting arm B . metacentric height C . height of the uncorrected KG D . natural rolling period

A . lower than the center of gravity B . at the same height as the center of gravity C . higher than the baseline D . on the longitudinal centerline

A . SOLAS A pack B . SOLAS B pack C . coastal pack D . small vessel pack

A . speed begins to drop B . stops C . receives ice damage D . becomes icebound

A . Master only B . Owners only C . Licensed officer on watch D . Any individual connected with the vessel

A . The aluminum will provide greater resistance to the spread of fire by conduction B . The aluminum structure is usually attached to a steel coaming by a method that insulates the two metals C . If the superstructure is stressed，an aluminum structure requires additional expansion joints to prevent fracture D . The steel at the area of the aluminum-to-steel connection must be closely checked for galvanic corrosio

A . aid turing the ship B . obtain a fine bearing C . increase ship swing to wind or tide D . lighten the stress of anchor chai

A . underway，but not making way B . aground C . being towed D . not engaged in pilotage duty

A . determine the cause before taking countermeasures B . assume the shift is due to off-center loading C . counterflood on the side opposite the list or trim D . assume the cause is environmental force

A . determine the cause before taking countermeasures B . assume the shift is due to off-center loading C . counterflood D . assume the cause is environmental force

A . Opening and closing the throttle B . Rocking the wings C . Flashing the navigational lights off and on D . Flashing Morse T

A . aid turning the ship B . obtain a fine bearing C . increase ship swings to wind or tide D . lighten the stress of anchor chai

A . lower than the center of gravity B . at the same height as the center of gravity C . heigher than the baseline D . on the longitudinal centerline

A . shape of the vessel's underwater hull remains the same B . vessel's center of gravity shifts to the center of the vessel's underwater hull C . vessel's center of buoyancy shifts to the center of the vessel's underwater hull D . vessel's mean draft increase

A、generally steady bearing and decreasing range B、generally steady range and increasing bearing C、 increasing range and bearing D、decreasing bearing only

A . The plane is in distress and will have to ditch B . The plane is going to drop a package and wishes the vessel to recover it C . Someone is in distress in that direction and the vessel should follow and assist D . There is danger ahead and the best course is indicated by the direction of the aircraft

A . list to stabilize at an angle of loll B . trim to stabilize at an angle of loll C . trim to increase D . trim to decrease

A . determine the cause before taking countermeasures B . assume the shift is due to off-center loading C . counterflood on the side opposite the list or trim D . assume the cause is environment force

A．Because it is extremely dangerous to conduct such research on an airplane. B．Because it remains a mystery what wavelengths are liable to be interfered with. C．Because research scientists have not been to produce the same effects in labs. D．Because experts lack adequate equipment to do such research. 此题为多项选择题。

A、Two; one at the forward, end the other at the most rearward location in the passenger cabin. B、Two; one at the most rearward and one in the center of the passenger cabin. C、Two; one located near or accessible to the flightcrew, and one located near the center of the passenger cabin.

A、Not more than 2 hours at cruise speed with one engine inoperative B、Not more than 2 hours at cruise speed in still air with one engine inoperative C、Not more than 1 hour at cruise speed in still air with one engine inoperative