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Home Surveys Sea Trials

Sea Trials for Sailing Yachts and Motor Boats


The level of sea trial on sailing yachts and motorboats depends on the vessel and objective of the sea trial, for instance when involved with the acceptance of the super yacht there would be a number of full day sea trials.  In most cases the core objective is the test the engine, view the sails and test the navigational equipment.  This can normally be done in an hour in clear water.

 

  • Does the engine does not run to the manufacturers stated maximum revolutions
  • Is the engine running too hot or cold
  • Is there cooling water flow (not always possible to see)
  • Do any of the alarms sound
  • Is the engine smoking – different smoke indicates different issues
  • How easy does the engine start from cold
  • Engine trim

 

Running an engine on a pontoon will not give as much information as the engine is not under load and at its operating temperature.

The steering, trim tabs, bow thrusters are also tested best in open water.  The engine and navigational equipment can be tested under operating conditions.

Before and after a sea trail, the bilges are always checked. Oil and water leaks cannot be disguised.

Sea trails on sailing yachts are conducted far less on sailing boats, they should not be done to see how a yacht sails in terms of performance.

Before and after a sea trail, the bilges are always checked. Oil and water leaks cannot be disguised.

 

Key Elements of a Sea Trial

  • Testing the Engine
  • Does the engine run the manufacturers stated maximum revolutions
  • Are there any visible oil, fuel or cooling water leaks
  • Is the engine running too hot or cold
  • Is there sufficient cooling water
  • Do any engine alarms sound
  • Are there excessive exhaust gases - different smoke indicates different issues
  • How easily does the engine start
  • Is the engine instrumentation functioning
  • Testing the Boat Trim (motor boats)
  • Does the stern drive leg trim function correctly
  • Do the trim tabs works
  • Testing the Navigational Equipment
  • Are there any signs of water leaking through skin or stern fittings
  • Check the steering
  • Inspecting the sails (if applicable)