2. Classification Surveys

2.1 Classification Surveys during Construction

(1) Survey

For classification survey of a dock gate, the materials, workmanship and arrangements are to be surveyed in the presence of the Surveyor from the commencement of the work until the com- pletion of the dock, and until the completion of the final test for machinery under the working

condition. Any item found not to be in accordance with the Rules or

any material, workmanship or arrangement found to be unsatisfactory are

(2) Hydraulic test

the approved plans, or

to be rectified.

Hydraulic test and leak test are to be carried out in accordance with Pt 3, Ch 1, 209. of the

Rules in the presence of the Surveyor.

(3) Inclining test

(A) The inclining test is to be carried out under the work completion state as par as practicable in order to obtain correct light displacement and the position of the center of gravity of the

dock gate.

(B) Prior to the inclining test, inclining testing schemes are to be submitted to the Society, and inclining test is to be carried out in the presence of the Surveyor.

(4) Opening and closing test of dock gate

After the completion of dock gate, opening and closing test of dock gate is to be carried out in accordance with operation manual and the condition is to be confirmed and leakage of water is to be checked. In this case, quantity of leakage is not to exceed a half of the capacity of

drainage system of the shipbuilding dock.

2.2 Periodical Survey

(1) Intermediate Surveys

(A) Intermediate Survey is to be carried out within 3 months before or after the second or the third anniversary date from the completion date of the initial classification survey or of the previous Special Survey.

(B) Intermediate Survey is to be carried out under the condition that dock gate is lifted to mini- mum draft.

(C) At each Intermediate Survey, the following parts are to be examined.

(i)

(ii)

(iii)

(iv)

(v)

(vi)

The shell plating above the waterline.

Internal examination of representative compartment.

Condition of air pipes, overflow pipes and overboard scuppers.

Companionways, ladders, and handrails and other means of protection that might be

provided for access to all spaces.

Condition of machinery, pumps and emergency lifting equipment. Condition of seals above water line.

(2) Special Survey

(A) The first Special Survey is to be completed within 5 years from the date of initial

classification survey and thereafter within 5 years from the credited date of the previous Special Survey.

(B) Special Survey of dock gate is to be carried out under the condition of dry docking or on slipway. However, the Survey of the outer bottom below the light waterline, at the Special

Survey, may be carried out by some combination of the following methods.

(C)

(i)

(ii)

(iii)

(iv)

(v) For

Ultrasonic measurement of plate thickness.

Heeling of the dock for partial examination of the bottom. Underwater photography.

Underwater television. Examination by diver.

each Special Survey, following requirements are to be examined in addition to the

Intermediate Survey requirements.

(i) Condition of means of protection to openings

(ii)

(iii)

(iv)

Internal examination of all compartments. However, internal examination of fresh water tank may be omitted where the result of outer inspection is good.

From the third Special Survey, the thicknesses measurement for the structural members

is to be carried out. Two transverse sections within the 0.4 Ã mid-length of the dock gate are to be measured.

Wear-down condition of seals