Black Signal Ball (300 mm)

300 mm Black Anchor Ball for Boats – COLREG Compliant Day Shape Signal

The 300 mm Black Anchor Ball is an essential nautical day signal for maritime safety and mandatory under international regulations for vessels over 7 meters in length. This day shape signal, compliant with the International Regulations for Preventing Collisions at Sea (COLREG), must be displayed when a vessel is at anchor to clearly indicate its status to other boats and prevent potential collisions.

Made of durable anti-glare black polycarbonate, this anchor ball ensures maximum visibility at distance, long-lasting performance, and excellent resistance to UV rays, weather conditions, and the marine environment. Its robust construction makes it ideal for continuous use in demanding nautical conditions.

Proper use of the black anchor ball helps clearly communicate the operational status of the vessel, significantly enhancing navigation safety during daylight hours.

Black Anchor Ball – Required Uses

The black day shape ball must be used in the following situations:

Vessel at anchor: Display one black ball during daylight hours.

Vessel not under command (NUC): Display two black balls vertically aligned.

Aground vessel: Display three black balls vertically aligned (always verify applicable regulations).

General distress or warning signal: May be used in combination with a square flag to indicate danger or request assistance.

Product Specifications – 300 mm Black Anchor Ball

Material: Anti-glare black polycarbonate, impact-resistant

Protection: UV-resistant and corrosion-resistant

Diameter: 300 mm (30 cm / approx. 12 inches)

Structure: Collapsible / detachable for easy storage

Mounting: Equipped with fixing holes

Use: Daytime anchor signal for boats

Compliance: COLREG compliant

Mandatory black anchor ball for vessels over 7 meters, ideal for ensuring visibility, compliance, and safety while at anchor.