A.the main source of energy
B.emergency source of electrical power
C.the reserve source of energy
D.all of above
您可能感興趣的試卷
你可能感興趣的試題
A.Goonhilly, UK
B.Yamaguchi, Japan
C.Perth, Australia
D.Southbury, USA
A.180E above the equator
B.64.5 E over the IOR
C.15.5W along the straight line
D.55.5W above the equator
A.complicated circumstances
B.changeable atmospheric pressure
C.large density of traffic
D.some strong signals from unwanted satellites
A.besides the polar regions
B.including the North Pole and the South Pole
C.above 70N and below 70S
D.as far north and south 70
A.Space segment, NCC, RCC, SES and CES
B.Space Segment, a satellite system, C system, NCC and NCS
C.Space Segment, NCC, NCS,CES and SES
D.A system, C system, satellite system, earth stations and NCS
最新試題
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
The advantage of geostationary satellites is（）.
Before GMDSS, if the radio officer on board is serious ill,（）.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
We consider（）send a helicopter with medical facilities to the distress area.
All coast radio stations（）DSC installed for VHF and HF.