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Lights & Shapes

Not under command

Technical visualVessel not under command
Vessel not under commandA vessel not under command shows two all-round red lights vertically and two balls vertically by day.all-round redall-round redtwo balls
Vessel not under commandA vessel not under command shows two all-round red lights vertically and two balls vertically by day.121all-round red2two balls

Not under command

Rule 27 defined status signal.

Lights

all-round red

all-round red below it

Day shapes

two black balls vertically

Means

Unable through exceptional circumstances to maneuver as required by the Rules.

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