An annual survey must be carried out on all ships within three months before or after each anniversary date of the completion of building, commissioning or special survey.
Docking survey are carried out at intervals not exceeding 2 yrs, except that where high resistance paint has been applied to the hull the intervals may be extended to 2.5 yrs.
At annual and docking surveys, the surveyor examines the ship and machinery so that he may satisfy himself with regard to their general condition.
Special survey’s are carried out at four years intervals in a dry dock, the surveys becoming more stringent as the age of the ship increases.
On the request of the owner a continuous survey may be carried out on the hull which all compartment of the hull are opened for survey and testing in rotation, with a five year interval between examination of each part.
Complete surveys of machinery are carried out at four yearly intervals. However, a continuous survey of machinery in which the various items are opened for survey in rotation may be conducted. In general, 1/5 of the machinery is examined each year with a five year interval between examination of each item.