Going Astern

Moving backwards through the water under engine or controlled momentum.

This is usually done when leaving a berth, stopping a vessel, or controlling position in a tight space. On many vessels the stern will not simply move straight back, because propeller effect, wind and tidal stream can push the bow or stern to one side. Good control depends on short, deliberate bursts of power, clear helm use and an awareness of what the vessel is doing rather than what the helm position suggests. Crew should keep a careful lookout aft and to both quarters, especially near pontoons, moorings and other vessels.