Types of Survey:
.types of survey
.type of survey .tos
- Initial Survey
- Annual Survey
- Intermediate Survey
- Renewal Survey
- Additional Survey
- Docking survey
- In water survey
- Special survey
Initial Survey:
The initial survey is held before the ship is put in service or when a new device is added to an existing ship, and the relevant certificate is issued to that ship. The initial survey includes a complete inspection, with tests, when necessary, of the structure, machinery and instruments to ensure that the requirements relevant to the particular certificate are compiled with structure, machinery and ships instruments are fit for the service and for voyage.
Annual Survey:
Annual survey is conducted once a year with leeway of 3 months. It is required by all the ships. A surveyor inspects all the equipment (LSA, FFA) and everything else during annual survey. Example- Load Line Survey
An annual survey allows the administration to verify the condition of ship and its equipment whether it is being maintained in accordance to the regulations. It consists of a certificate examination, a visual examination of the ship and its equipment, and certain tests to ensure that their condition is being properly maintained according to conventions. The content of each annual survey is given in their respective guidelines. It should also include a visual examination to confirm that no unapproved modifications have been made to ship and its equipment
Intermediate Survey:
Generally, it is conducted after 2.5 years of previous survey certification or after the third anniversary date of the appropriate certificate and should take place after one of the annual surveys.
The intermediate survey is inspection of items appropriate to particular certificate to ensure equipment are working in good conditions and they are seaworthy.
When specifying items of hull and machinery for detailed examination, due account shall be taken of any continuous survey schemes that they are in a satisfactory condition and they are fit for service and voyage.
Renewal Survey:
It is conducted before the appropriate certificate is renewed but not exceeding 5 years. The renewal survey should consist of an inspection, with tests when necessary, of the structure and machinery spaces to ensure that relevant certificates are compiled with the equipment checked during survey. All certificates, record books, check list, recording manuals and other documents are also checked during Renewal survey.
Additional Survey:
Whenever accidents occur to a ship or any damage is caused which affects the safety or integrity of ship or the efficiency or completeness of its equipment, the master or owner should make a report as soon as possible and submitted to the administration, the nominated surveyor or recognized organization responsible for issuing that particular certificate should then initiate an investigation/inspection to determine whether a survey, as required by the regulations applicable to the particular certificate, is necessary. This additional survey, should be such as to confirm that the repairs and any renewals have been effectively made and the ship and its instruments are fit for ship and for further voyage.
Docking Surveys
Ships are to be examined in drydock at intervals not exceeding 2½ years twice in 5 years period. And the interval between two docking survey should not exceed 36 months. At the drydocking survey, particular attention is paid to the shell plating, stem frame and rudder, external and through hull fittings, and all parts of the hull particularly liable to corrosion and chafing, and any unfairness of bottom.
In-water Surveys
The Classification Society may accept in-water surveys in lieu of any of the two dockings required in a five-year period. The in-water survey is to provide the information normally obtained for the drydocking survey. Generally consideration is only given to an in-water survey where a suitable high resistance paint has been applied to the underwater hull.
Special Surveys
The special surveys are carried out at intervals of 5 years. A more thorough examination is required at the special surveys. The shell plating, stern-frame and rudder are inspected. The holds, peaks, deep tanks and double bottom tanks are cleared and examined. The tanks are tested for water-tightness. The bilges and tank top also are inspected. Thickness measurement of hull plating is also carried out and recorded. Special survey hull requirements are divided into four ship age groups as follows:
1. Special survey of ships – five years old
2. Special survey of ships – ten years old
3. Special survey of ships – fifteen years old
4. Special survey of ships – twenty years old and at every special survey thereafter
In each case the amount of inspection increases and more material is removed so that the condition of the bare steel may be assessed.