Standard Horizon VLH-3000 Owner's Manual page 13

The fog horn function sounds a horn repeatedly until the function is turned off.
TYPE PATTERN
UNDERWAY One 5-second blasts evey 120 seconds.
STOP Two 5-second blasts (separated by 2 sec-
onds) evey 120 seconds.
SAIL One 5-second blasts followed by two 1-sec-
ond blasts (separated by 2 seconds) evey
120 seconds.
TOW One 5-second blasts followed by three 1-sec-
ond blasts (separated by 2 seconds) evey
120 seconds.
AGROUND One 11-second rings evey 60 seconds.
ANCHOR One 5-second rings evey 60 seconds.
VLH-3000
FOG HORN TIMING CHART
Listen Back
120s
5s
Listen Back
2s
120s
1s 1s
Listen Back
2s 2s
120s
1s 1s 1s
Listen Back
2s 2s 2s
120s
Listen Back
60s
Listen Back
60s
Motor vessel underway and
making way.
Motor vessel underway but
stopped (not making way).
5s
2s
Sailling vessel underway, fish-
ing vessel (underway or an-
chored), vessel not under com-
mand, a vessel restricted in her
1s 1s
ability to maneuver (underway
or at anchor), or a vessel tow-
2s 2s
ing or pushing another ahead.
Vessel under tow (manned).
1s 1s 1s
2s 2s 2s
Vessel is aground.
Vessel is at anchor.
USAGE
Page 13