Attwood Round LED 3-Mile Transom Navigation Light

The Attwood Round LED Transom Navigation Light throws 135 degrees at 3NM for pleasure craft up to 164 feet, with an electropolished stainless cover.

A hundred and thirty-five degrees is the stern light arc, and it has to align with the boat's centerline to be correct. The sector is measured from dead astern, so a transom light mounted off-center or angled shows white into the sidelight sectors, which misinforms an approaching vessel about your aspect.

Three nautical miles covers craft up to 50 meters, which is a considerably higher rating than most transom lights carry. Attwood was among the first to bring a genuine 3NM LED transom light to market, and the rating matters for larger vessels where a 2NM light would not comply.

The surface-mount design uses a snap feature that eliminates exposed fasteners. That keeps the transom clean and removes the fastener heads that would otherwise sit in spray and start weeping rust down the hull. Explore more navigation lights.

• 135 degrees is the stern arc, measured from dead astern
• Off-center mounting shows white into the sidelight sectors
• 3NM covers craft up to 50 meters
• Snap fit, so no fastener heads to weep rust