Five or more short blasts on a vessel’s whistle indicates that she is ______.
A.in doubt that another vessel is taking sufficient action to avoid a collision
B.altering course to starboard
C.altering course to port
D.the stand-on vessel and will maintain course and speed
第1题：
One blast at one-minute intervals
One blast at two-minute intervals
Two blasts at one-minute intervals
One prolonged and two short blasts at two-minute intervals
第2题：
one short blast
one prolonged blast
two short blasts
第3题：
Approaching a anchorage in fog, you hear one short, one prolonged, and one short blast in that sequence on a ship’s whistle. This indicates ______.
A.A vessel towed
B.A vessel not under command and unable to maneuver.
C.A vessel anchored giving warning of her position.
D.A vessel stopped dead in the water.
第4题：
When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signal
Only the stand-on vessel can sound the danger signal
Distress signals may be used in place of the danger signal
The danger signal consists of 4 or more short blasts of the whistle
第5题：
of
off
to
with
第6题：
vessel not under command
sailing vessel
vessel in distress
vessel being towed
第7题：
one short blast
one prolonged blast
two short blasts
three short blasts
第8题：
If you do NOT understand the course or intention of an approaching vessel you should sound ___________.
A.one short blast
B.one prolonged blast
C.not less than five short blasts
D.not less than five prolonged blasts
第9题：
stand-on vessel and would sound two short blasts
give-way vessel and would sound no whistle signal
stand-on vessel and would sound no whistle signal
give-way vessel and would sound two prolonged blasts followed by two short blasts
第10题：
one short blast
one prolonged blast
not less than five short blasts
not less than five prolonged blasts