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3.) OPERATION
At-Will Operation of Connected Devices:
The buttons above the ship graphic on the membrane switch panel correspond to each of the
devices controlled by the M-522 unit. To operate any device connected to the M-522 on an "At-
Will basis, simply press the appropriate button as follows:
These switches will illuminate whenever the corresponding device is activated.
Automatic Operation of Connected Devices:
The M-522 generates automated signal codes for vessels in restricted visibility conditions
according to International Maritime Organization requirements (IMO COLREGS, RULE 35).
These automated signals are controlled by the row of buttons directly beneath the ships graphic
on the faceplate as shown below:
Automatic On/Off
The Automatic On/Off button starts and stops the automatic signaling of any selected horns or
morse light. A red LED on this switch will illuminate when automatic signaling is turned on.
When turning automatic signaling on, the first "on" signal or blast from the horn occurs
approximately 5 seconds after the button is pressed.
Cycle Code Interval
The Cycle Code Interval button selects the interval (120, 90, 60, or 40 seconds) that the selected
code will be repeated. Per IMO requirements, a 120 second interval is standard. However, this
button can be pressed repeatedly to cycle through the available time intervals to signal more
frequently.
Instructions, M-522, Software Rev. R., Rev. 10/7/2019
AFT HORN
MORSE LIGHT
FORWARD
HORN
Page 6 of 10
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