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Stronger echoes will produce colors in the red end of the spectrum

It is 100% waterproof

The B922 combines WiFi and Bluetooth for seamless wireless connectivity and AIS data steaming to any mobile device or PC

OB1005P Pink OverBoard 20L Dry-Tube lim over og under vandlinjenThanks to welded seams and reliable "Fold Seal System", OverBoards Dry Tubes are 100% waterproof, withstand rapid immersion in water and float when dropped in water. OverBoards Dry Tubes are made from nylon coated PVC material and are super durable and easy to wipe off, which also means they can withstand rough treatment. A fully adjustable and removable strap means you can carry this bag over your shoulder. All this makes OverBoard Dry Tubes the