APISQUEEN W300 Waterproof Remote Controller with GPS Module for Boat Thruster, Cruise Control

When operating the vessel in a river or body of water, users may need to hold their position; however, wind and currents can make it difficult to remain stationary. To use the electronic anchor feature, position the bow facing into the wind or current and briefly press the "OK" button to engage it; briefly press the "OK" button again to cancel it.
[Note: The electronic anchor cannot maintain a position with 100% precision.]