Components

Forward ETA

Aft ETA

Pick-up gear

(Optional)

Yes

Towing pennant

(Optional)

Yes

Chafing gear

Yes

(Depending on design)

Fairlead

Yes

Yes

Strong point

Yes

Yes

Pedestal roller

Yes

(Depending on design)

Test item

Test method

Acceptance criteria

Strength test

(A) Strength components of ETA, i.e., towing pennant, chafing gear, fairlead and strongpoint, etc., are to be assembled and fitted on the test unit ac- cording to the manufacturer's drawings. Tensile loads are to be applied and kept for at least 1 minute to the towing pennant or chafing gear with the tensile force directions and test loads as given in the following (a) and (b).

(a) Tensile force directions

(i) 90 °C from the ship's centerline to port and starboard, and 30 °C vertical downwards

(ii) 0 °C sideway from the ship's centerline, and 30 °C vertical down- wards

(b) Test loads

(i) 2,000 kN for 1,000 kN type ETA

(ii) 4,000 kN for 2,000 kN type ETA

(B) Towing pennant, chafing gear, fairlead and strongpoint to be used for the strength test in (A) above, are to be of the products as follows:

(a) Towing pennant, chafing chain and their connecting parts

They are to be made by a manufacturer with the manufacturing proc- ess approved by the Society in principle, and to be accepted to the production test by the Society.

(b) Fairlead and strongpoint

They are to comply with the requirements in Pt 2 of the Rules and to be wholly examined by ultrasonic test in principle, but, if impracti- cable, may be examined by effective nondestructive test such as mag- netic particle test.

(C) For other major components of strength member than those in (B) above, the Society may require certain tests or inspections prior to the strength test, if deemed necessary.

Each component of the ETA is to neither be broken nor destroyed.

Deployment test

A deployment test as given in the following (A) and (B) is to be carried out during night time condition using prototypes fitted on a ship according to the manufacturer's drawings. In this test, only emergency power is to be used.

(A) The aft ETA is to be deployed in accordance with the operation manual prepared by the manufacturer, and the following (a) and (b) are to be verified.

(a) It is to be capable of being deployed within 15 minutes in harbour conditions. Time duration of deployment operation is counted from the time when a lid of the pick-up gear container is opened, to the time when inboard termination of the towing pennant or chafing gear touches to the strongpoint without any trouble.

(b) The pick-up gear is to be designed for manual operation by one per- son taking into account the absence of power.

(B) The forward ETA is to be deployed within 1 hour in harbour conditions in accordance with the operation manual prepared by the manufacturer. Ten persons in max. are to be employed in the deployment work on board the ship during the test.

ETA is to be deployed in accordance with the operation manual pre- pared by the manu- facture

Strength test for wire rope terminations of towing pennant

Wire rope terminations of towing pennant such as splicing, socket, etc., are to be prototype tested for 3 pieces of test specimens in accordance with the manufacturer's specifications, by the test load specified in (A) of strength test above for at least 1 minute.

In case where even 1 piece of the test speci- men could not with- stand the test load, the proposed termination is not to be accepted.

Others

To be as deemed appropriate by the Society

To be as deemed appropriate by the Society