Appendix; Fog Horn Timing Chart - Vertex Standard VM-3500E Owner's Manual

15 APPENDIX

FOG HORN TIMING CHART

The fog horn function sounds a horn repeatedly until the function is turned off.
TYPE PATTERN
UNDERWAY One 5-second blasts every 120 seconds.
STOP Two 5-second blasts (separated by 2
seconds) every 120 seconds.
SAIL One 5-second blasts followed by two 1-
second blasts (separated by 2 seconds)
every 120 seconds.
TOW One 5-second blasts followed by three 1-
second blasts (separated by 2 seconds)
every 120 seconds.
AGROUND One 11-second rings every 60 seconds.
ANCHOR One 5-second rings every 60 seconds.
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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
Sailing vessel underway, fish-
ing vessel (underway or an-
chored), vessel not under
command, a vessel restricted
1s 1s
in her ability to maneuver (un-
derway or at anchor), or a
2s 2s vessel towing or pushing an-
other ahead.
Vessel under tow (manned).
1s 1s 1s
2s 2s 2s
Vessel is aground.
Vessel is at anchor.
USAGE
VM-3500E