The required sound signals for these
In the Inland Rules, no provisions are made
for a vessel constrained by its draft.
situations are the same as those addressed for
the same situation in the Inland.
The International Rules address vessels
engaged in fishing while at anchor and
vessels restricted in their ability to maneuver
when carrying out work at anchor separately.
A vessel towed (or if more than one vessel is towed,
the last vessel of the tow), if it is manned will, at
intervals of not more than 2 minutes, sound four blasts
in succession; namely, one prolonged blast followed by
three short blasts. When practical, this signal must be
Figure 5-17.International/inland distress signals.