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Day Shapes and Signals

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Diamond Day Shape, 24" x 48"

Diamond Day Shape, 24" x 48"

Mfr. Jim Buoy | Mfr No. 1902

Jim Buoy Diamond Day Shape is 24" x 48" and created so boaters can meet existing international COLREG rules. Heavy-duty vinyl coated nylon fabric stainless steel framing...
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Hour glass devices on large boats

Sorry to bother you. We are in Neah, Washington, passing thru on our boat. We see many large fishing boats with nets/seines. Several have these double coned black hour glass shaped "net devices" about 3’ x 1 1/2’. hanging above their decks. We can’t figure out what these are. Your education of us would end an eveningful of suspense! Thanks much.

I’m a veterinarian. If I can answer any questions for you, feel free!

Submitted by: Chuck

Those are Day Signals or Day Shapes used for communcation (just like Navigation Lights at night). The fishing vessels are displaying correct Day Shapes

There are five types of day shapes: Circle, Diamond, Cone Apex Pointed Up, Cone Apex Pointed Down, and a Cylinder. All day shapes are black in color. See the USCG Navigational Rules.

1) At Anchor - Single round ball
2) Aground - Three round balls in a vertical line.
3) Making way with sails up and motor on - Inverted cone ( only required for sailboats, 12 meters or larger ).
4) Dredging or making way with an obstruction on one side - Two green lights or two diamonds in a vertical line to indicate the side safe to pass. ( Diamonds are a sailors best friend - Thus, safe to pass. ) Two red lights or two circles in a vertical line to indicate the side which has the obstruction.
5) Vessel not under command - Two round balls in a straight line.
6) Vessel restrained by draft - A cylinder.
7) Vessel restricted in her maneuverability - Three shapes in a straight line. The top and the bottom are a ball and the middle is a diamond.
8) Vessel engaged in fishing - Two cones in a vertical line with their apexes pointed at the center.

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