Skip to main content
IALA
COLREG
COLREG
IALA
Lights
GMDSS
Language
EN
ES
CA
Quick sprint
Sign in
1/30
0✓
Which practice should be avoided under Rule 20 — Application (Lights)?
A
Treating daytime fog as if navigation lights are optional.
B
Applying the crossing or head-on rules to radar-only contacts.
C
Confusing the vertical positioning of forward and after masthead lights.
D
Confusing NUC lights (red-red) with RAM lights (red-white-red).