In dinghy

Dinghy

A dinghy is a type of small boat, often carried or towed for use as a ship's boat by a larger vessel. It is a loanword from either Bengali or Urdu. The term can also refer to small racing yachts or recreational open sailing boats. Utility dinghies are usually rowboats or have an outboard motor,...

 sailing

Sailing

Sailing is the propulsion of a vehicle and the control of its movement with large foils called sails. By changing the rigging, rudder, and sometimes the keel or centre board, a sailor manages the force of the wind on the sails in order to move the boat relative to its surrounding medium and...

, a boat is said to be turtling when the boat is fully inverted with the mast pointing down to the seabed. The name stems from the appearance of the upside-down boat, similar to the shell of a sea turtle.

Turtling commonly occurs when a boat capsize

Capsize

Capsizing is an act of tipping over a boat or ship to disable it. The act of reversing a capsized vessel is called righting.If a capsized vessel has sufficient flotation to prevent sinking, it may recover on its own if the stability is such that it is not stable inverted...

s and is not righted or attended to in time, allowing it roll through the approximately 90 degrees of a capsize through to 180 degrees.