On 2 Apr, 21:51, Justin C <justin.0...@[EMAIL PROTECTED]
> wrote:
> I can understand '10s' in the case of group fla****ng
> (Fl(3) R 10s), but there's no number here, so is it on for, say, 7
> seconds and then off for 3? Is that what it means?
Two issues here. First of all, "Fl 10s" is a short flash every ten
seconds. No need to specify the length of the flash. So "Occ 10s" is a
short period of darkness, every ten seconds.
> Surely, a light
> that's on for (out of 10 seconds) less than 7 would be almost isophase
> and therefore could cause confusion, and any light that's on for 8 or 9
> seconds could be considered, in amongst the jumble of lights on the
> shore, fixed and probably not a nav light at all.
Different matter. No, it may not be easy to disinguish. But then, a
fla****ng light can also be a bugger to pick out. I think (... gropes
in memory ...) that Campbeltown Marina used to have one at the seaward
end which was tricky against the traffic on the main street.
Ian
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