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Old 15-04-2018, 09:03   #1
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Nav lights

Q1) You are sailing at night and see a pair of lights dead ahead, a green one to port and a red one to stbd. What is it?
Got it? Good work, now try this one

Q2) You are sailing at night and see a pair of lights dead ahead, a red one to port and a green one to stbd. What is it?
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Old 15-04-2018, 09:18   #2
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Re: Nav lights

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Q2) You are sailing at night and see a pair of lights dead ahead, a red one to port and a green one to stbd. What is it?
Red light to port is the port side of a vessel which has crossed your course line from stbd to port.

Green light to stbd is the stbd side of a vesssel which has crossed your course line from port to stbd.

Assuming no other lights, they are both sailing (no steaming light) and you are not yet 22.5 degrees abaft the beam of either one (side light, no stern light.)
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Old 15-04-2018, 11:04   #3
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Re: Nav lights

Ha ha, good one Tom. I hadn't thought of two vessels.
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Old 15-04-2018, 15:01   #4
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Re: Nav lights

A pair of channel markers?

Or are we assuming that the lights are from one or more vessels?
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Old 15-04-2018, 16:30   #5
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Re: Nav lights

Stum
That works if you live in a place where the buoys have fixed lights
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Old 15-04-2018, 18:02   #6
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Re: Nav lights

Your reflection?

One of those shoreside restaurants where the put up nav lights for decoration, but some lubber installed them on the wrong sides?
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Old 16-04-2018, 04:04   #7
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Re: Nav lights

Reflection off the side of an iceberg?

The shoreside restaraunt reminds we of the night I was towed in by the USCG and during the subsequsnt inspection I noted that their side lights were reversed. They were so grateful for pointing this out that they let me walk despite not having a bell.
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Old 16-04-2018, 04:35   #8
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Re: Nav lights

If they are flashing, harbour entrance. Once direct approach and once entrance behind a sea wall (if you take the direct route you crash the wall).

Keep also in mind that tonnage systems are swapped around in some areas.
Like US & Caribbean "Red Right Return" , in Europe its "Green Right Return" ...
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Old 17-04-2018, 15:37   #9
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Re: Nav lights

What is it?
A seaplane flying upside down
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Old 17-04-2018, 16:23   #10
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Re: Nav lights

A poorly executed amateur nav light installation on an approaching vessel.
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Old 17-04-2018, 16:25   #11
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Re: Nav lights

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What is it?
A seaplane flying upside down
But not for long
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