1. BOTH INTERNATIONAL & INLAND In a dense fog, you hear a whistle signal of one prolonged blast followed by three short blasts. This signal is sounded by a __________.

manned vessel being towed
fishing vessel underway trawling
pilot vessel underway making a special signal
vessel not under command

2. INLAND ONLY A vessel displaying a flashing blue light is __________.

transferring dangerous cargo
a law enforcement vessel
a work boat
engaged in a race

3. BOTH INTERNATIONAL & INLAND You are underway in a fog when you hear a whistle signal of one prolonged blast followed by two short blasts. This signal could indicate all of the following EXCEPT a vessel __________.

being towed
not under command
fishing with trawls
towing astern

4. BOTH INTERNATIONAL & INLAND A vessel being towed astern, where the length of the tow exceeds 200 meters, will exhibit __________.

two balls in a vertical line
a diamond shape where it can best be seen
a ball on each end of the tow
no dayshape

5. BOTH INTERNATIONAL & INLAND What dayshape is to be shown by a vessel aground?

A cylinder
Two cones with their apexes together
Two black balls in a vertical line
Three black balls in a vertical line

6. BOTH INTERNATIONAL & INLAND You are approaching a narrow channel. Another vessel in the channel can only be navigated safely in that channel. You should __________.

hold your course and speed if he is on your port bow
sound three short blasts, and take all way off your vessel
not cross the channel if you might impede the other vessel
sound two prolonged blasts followed by one short blast

7. BOTH INTERNATIONAL & INLAND When two power-driven vessels are meeting head-on and there is a risk of collision, each shall __________.

stop her engines
alter course to starboard
sound the danger signal
back down

8. BOTH INTERNATIONAL & INLAND Which vessel MUST show two masthead lights in a vertical line?

A power-driven vessel less than 50 meters in length with a 20-meter tow
A sailing vessel towing a small vessel astern
A vessel not under command
A vessel engaged in dredging

9. BOTH INTERNATIONAL & INLAND The whistle signal for a vessel operating astern propulsion is __________.

one long blast
one prolonged blast
three short blasts
four or more short blasts

10. INTERNATIONAL ONLY If you sighted three red lights in a vertical line on another vessel at night, it would be a vessel __________.

aground
constrained by her draft
dredging
moored over a wreck