By January 29, 2016 Comments Off

When do vessels need their compasses adjusted?

  • After periods of lay up.
  • When a new compass is installed.
  • When deviation exceeds 5 degrees.
  • On a new vessel or in a new area of operation.
  • After trauma, such as lightning strike, grounding, fire, etc.
  • When compass performance is unsatisfactory or unreliable.
  • When a record of compass deviation has not been maintained.
  • After alterations and additions to the vessel’s structure and equipment.
  • After repairs involving welding, cutting, grinding, etc. which may affect the compass.
  • When electrical or magnetic equipment close to the compass is added, removed or altered.
  • When compass deviation does not appear to correspond with that shown on deviation card.