Describe Naval Security Zones
→ No vessel within 100 yards of a Navy vessel longer than 100 feet. Vessels within 500
yards must operate at minimum speed.
What does one long blast mean?
→ This means you are leaving a dock or departing your slip. It signals to others a change
in status and...
ASA 103 ATONS: MARKERS, BOUYS,
LIGHTS, TRAFFIC, CHARTS QUESTIONS
AND ANSWERS 2024/2025
Describe Naval Security Zones
→ No vessel within 100 yards of a Navy vessel longer than 100 feet. Vessels within 500
yards must operate at minimum speed.
What does one long blast mean?
→ This means you are leaving a dock or departing your slip. It signals to others a change
in status and that you are getting underway.
→
→ A prolonged blast is also sounded when a vessel is approaching a bend in a river
where vessels coming from another direction cannot be seen. It is sometimes referred to
as the "blind bend signal".
What do two short blasts mean?
→ This means "I intend to leave you on MY starboard side."
→
→ When you pass near another boat, you will maneuver by leaving them on your right
side as you pass. If you are behind another boat, going the same direction and about
to overtake it, two short blasts means: "I intend to pass you on YOUR port side, MY
starboard side."
→
→ Think of liquid highway lanes and passing lanes
What do Three Short Blasts mean?
→ This means you are operating in astern propulsion, does not necessarily mean you are
backing up.
What does One Prolonged Blast + Three Short Blasts mean?
→ One prolonged blast indicates you are getting under way, followed by three short
blasts (operating stern propulsion) indicates you are backing up. This is what is
sounded when you are departing a dock in reverse.
→
→ This is technically two different signals in succession.
What do Five Short Blasts mean?
→ This is the DANGER signal. It says, I am unsure of your intentions!
→ Remember, when you approach another vessel and hear either one or two short blasts,
and you both understand their signal and can safely let them execute, you are then
required to respond with the same signal in response. If you don't understand their
intentions, or feel that their proposed maneuver is dangerous to either vessel, then you
are required to sound the DANGER signal.
When crossing a traffic separation zone (aquatic center divider) what must be considered?
→ Avoid crossing, but if you must, cross at a right angle as quickly as is safe and possible.
In reduced visibility, such as fog what are your obligations?
→ Note your position relative to your destination and plot a course for safe return to
port. Post a lookout at the bow. Rule 35g requires vessels under sail to make a sound
signal of 1 long and 2 short blasts at 2minute intervals. Vessels under power 1 long
blast every 2minutes.
Rule 6
→ Every vessel must proceed at a safe speed taking into account conditions.
All vessels underway must display the following lights:
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