Structural strength requirement for ETA ?

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FOLLOW

TOWING COMPONENT SHOULD HAVE A WORKING STRENGTH OF AT LEAST 1000KN FOR TANKER OF 20000DWT & ABOVE BUT LESS THAN 50000 DWT
AT LEAST 2000KN FOR FOR TANKER OF 50000DWT AND ABOVE
WORKING STRENGTH IS DEFINED AS ONE HALF OF ULTIMATE STRENGTH.
STRENGTH SHOULD BE SUFFICIENT FOR ALL RELAVENT ANGLE OF TOW LINE.
UP TO 90 DEG FROM SHIP CL TO PORT & STBD 30 DEG VERTICALLY DOWNWARD.
TOWING PENNANT SHOULD HAVE A LENGTH OF AT LEAST TWICE THE LIGHTEST SEA GOING BALLAST FREE BOARD AT THE FAIR LEAD + 50m.

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