rhys wrote:

1) Running lights are always on at dusk.

2) Mast top trilight is on, too, although I am only obliged to have
one or the other.

Required to have one *or* the other, as far as I know, as otherwise
you'd be showing the lights of some other type of vessel. In practice,
though, I'm sure anyone watching would be able to tell the difference
between you and a fishing boat/dredger/pilot boat or whatever.

Pete