Lying ahull
Encyclopedia
In sailing, lying ahull is a controversial method of weathering a storm, by downing all sails, battening the hatches and locking the tiller to leeward. Unlike heaving to
Heaving to
In sailing, heaving to is a way of slowing a sail boat's forward progress, as well as fixing the helm and sail positions so that the boat does not actively have to be steered. It is commonly used for a "break"; this may be to wait for the tide before proceeding, to wait out a strong or contrary...

, a sea anchor
Sea anchor
A sea anchor, is a device external to the boat, attached to the bow used to stabilize a boat in heavy weather. It anchors not to the sea floor but to the water itself, as a kind of brake. Sea anchors are known by a number of names, such as drift anchor, drift sock, para-anchor, and boat brakes...

is not used, allowing the boat to drift freely, completely at the mercy of the storm.
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