Yellow or alternating white and yellow
- Proceed with caution.
- Range operations are in progress but no torpedoes or testing is occurring.
- Be prepared to shut down engines when lights change to red.
Red or alternating white and red
- Range operations are in progress and submarine torpedo and/or sound testing are occurring.
- Stop engines until red beacons have been shut off, showing test is completed.
- Follow the advice of Naval Guard Boats when in or near the range area.
Operational Periods
- Typically, boat passage is permitted between tests when the yellow beacons are operating.
- Normally, tests and torpedo runs are confined to periods of less than 30 minute durations.
- Submarine operations can occur for longer periods.
