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Offspring International uses premium quality yarns of multifilament nylon, HT polyester and blended fibres in the manufacture of mooring hawsers.

Selecting Mooring Hawsers

Offspring’s full range of Single Point Mooring products is manufactured and supplied in strict accordance with the latest guidelines from the Oil Companies International Marine Forum (OCIMF) including OCIMF 2000 ‘Guidelines for the Purchasing and Testing of SPM Hawsers’.

The OCIMF recommends that when selecting hawsers, terminal operators’ selection criteria should not only include strength but also energy absorption and fatigue performance. Detailed information on this can be found in the OCIMF 2018 ‘Guidelines for Offshore Tanker Operations’.

Moreover, it should be kept in mind that the NWBS (New Wet Break Strength), energy absorption and fatigue performance of hawsers will deteriorate during service under the influence of factors such as service life, cyclic load history, hawser type, construction, environmental conditions, damage and stowage arrangements between use.

Terminal operators should take these factors into account when determining the appropriate hawser for the mooring system and hawser retirement criteria.

Mooring Hawser Construction

We manufacture in Double Braid (Lankhorst Double Braid 32/64), Circular Braided (Lankhorst Gama 98®) and conventional eight strand constructions.

Lankhorst Double Braid 32/64 is constructed with a separate outer braided sheath (64 strands) and inner braided core (32 strands), with an equal number of left and right hand strands to provide a torque free rope. The balanced flexible construction distributes the weight and strength equally between the sheath and braided core. As per ISO 10554, neither the inner or outer braid shall exceed 55% of the total weight of the rope.

Lankhorst Gama 98® is constructed from high efficiency sub-rope cores laid parallel within an outer braided jacket. Each sub-rope is computer monitored during production to ensure all sub-ropes have equal tension and length. The outer jacket is essentially non-load bearing.

Integral Hawser Flotation

Hawsers can be supplied with Integral Flotation system and/or PU encapsulation for increased durability and operational cost savings.

For more information on Mooring Hawsers email Offspring International at


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