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Kahlenberg Instruction Sheet 323
INTERNATIONAL - RULE (A)
WHEN VESSELS ARE IN SIGHT OF ONE ANOTHER, A POWER-DRIVEN VESSEL
UNDERWAY, WHEN MANEUVERING AS AUTHORIZED OR REQUIRED BY THESE
RULES, SHALL INDICATE THAT MANEUVER BY THE FOLLOWING SIGNALS ON
HER WHISTLE:
ALT STBD
ALT PORT
ASTERN
DANGER
*Note:
The above is intended as a quick reference guide only and in no way is intended to
be a replacement for the complete Rule 34 as included in the 72' COLREGS
MANEUVERING CODES
RULE 34
One Short Blast
"I am altering my course to Starboard"
Two Short Blasts
"I am altering my course to Port"
Three Short Blasts
"I am operating Astern Propulsion"
Five Short Blasts
"Danger"
Failure to understand intentions or actions, or in doubt
Rev. 6/29/2011, Page 5 of 7
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