Technically there is no defined 'long' blast. It is called
a 'prolonged' blast.

CN

"Michael" wrote in message ...
Three blasts, one long followed by two short at intervals of not more than
three minutes.

Vessels Not Under Command, Restricted In Ability To Manuever whether
underway or at anchor, the aforementioned sailing vessel, vessel fishing
whether underway or at anchor, vessel towing or pushing another.


"Bart Senior" wrote in message
oups.com...
BOTH INTERNATIONAL and INLAND
A sailing vessel with the wind abaft the beam is
navigating in restricted visibility. She should
sound______________.

A. three short blasts
B. one prolonged blast
C. one prolonged blast and two short blasts
D. two prolonged blasts

Extra credit.

How often should they be sounded?
What other conditions require this sound signal?