"Not under command" (NUC) all-round red lights (Rule 27(a)(i))
may be used as part of the "Restricted Ability to Manoeuvre" (RAM)
lights provided the vertical and horizontal distances required by
COLREG 1972 are complied with and the electrical system is arranged
so that the all-round white light (RAM) may be switched on independently
from the two all-round red lights (NUC).