Hollis Marker Buoy – High-Visibility Surface Signaling DeviceMarker Buoy The Hollis Marker Buoy is an essential safety tool for divers who need reliable surface signaling. Easy to deploy and highly visible, this buoy ensures boat crews and dive partners can quickly locate you, making it a must have accessory for every dive. High Visibility Design Bright color ensures you can be seen easily on the surface. Durable Construction Built with tough materials to withstand repeated use and harsh environments. Compact