SIM On-Hire Surveys / Off-Hire Surveys are conducted to determine the extent of damage which may have occurred to the ship and her equipment between the commencement and termination of charter. This inspection also includes the checking of documents and certificates and the establishment of quantities of fuel and stores on board.
SIM surveyors take measurements and calculation of bunker quantity on board in connection with Charter delivery/re-delivery. They sound the fuel and diesel tanks or witness the ullaging / sounding by a ship's engineer and obtain temperatures where possible. Checking bunkers is also required of a SIM surveyor when carrying out an "On hire / Off hire" survey; however a bunker survey may be called for as a stand alone survey.