Marine chocks

NS2589 Bulwark Mounted Mooring Chock

  • Material: Cast Steel
  • Nominal Size: 300*250mm to 400*250mm
  • SWL: 445kN to 625KN
  • Weight: 105kg- 145
  • Certificate: CCS, ABS, BV, LR, DNV, etc.
  • Features Of NS2589 Bulwark Chocks 
    1. Anti-corrosion protective surface treatment;
    2. Simple structure design.


The NS2589 Bulwark Chocks are cast steel chocks. The mooring chocks are the bulwark mounted types and are made according to the NS 2589 standard. They are approved by the Panama Canal Commission (PCC). There is no any stiffening plate around the chocks, so there are two sizes for the NS2589 chock without too much SWL. The Nominal Size of 300*250mm is designed as a single chock in PCC and shall be capable of withstanding a strain of 445KN on a towing wire. The Nominal Size of 400*250mm is designated as double chock in PCC and shall be capable of withstanding a strain of 625KN on a towing wire.

The marine chock is an important mooring equipment. There’re different types of mooring chocks with different standards including ISO, JIS, DIN, NS. SWL will be from 8KN to 3000KN according to your requirements. In the process of mooring ship, it bears huge loads. Usually, the ship bollards and mooring chock are for the whole ship mooring use. The general bow and stern of ship block the bollard fairlead, quantity large. Of intermediate section above without or bollards, fairlead rarely. Fairlead is oblique chock more insurance, because it is closed, the cable will not jump out. The triangle chocks are widely used for small boats and different vessels, such as container vessels, tankers, bulk carriers, tug, dry cargo vessels, etc.

Marine mooring chock has two types: deck mounted chock & bulwark mounted chock. The material is casting steel ZG230-450 normally. IACS approved quality to withstand all conditions. Certificated by BV, ABS, LRS, DNVGL, RS, IRS, CCS, KR, NK, etc. We could also provide you with a customized design with CAD drawings.

Machine Specifications

NS2589 Bulwark Mounted Mooring Chock
Nominal Size SWL Dimensions(mm) Weight
(mm) (kN) B1 H1 L1 W1 W2 (kg)
300*250 445 348 610 660 300 250 105
400*250 625 348 610 760 400 250 145

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