MARICO Marine NZ Limited WELLINGTON HARBOUR PORT AND ...

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Report No: 05NZ104 WELLINGTON HARBOUR Issue: Issue 1.1 Operational Risk Assessment 9 CENTREPORT MARINE SERVICES 9.1 PILOT VESSELS CentrePort operates two pilot vessels. One is a twin engine, 14.6 metre, aluminium design with the good seakeeping ability necessary for boarding operations in the harbour approaches. A backup is provided by a 12.6 metre rigid hulled inflatable powered by twin petrol outboard motors. This is operated on a joint venture basis with the Wellington Volunteer Coastguard. Tugs are occasionally used to transfer pilots – normally to a vessel anchored in the stream prior to berthing17. Authors normally discourage this practice unless it occurs in sheltered waters (as is the case) as the heavy displacement of a tug can trap the pilot ladder as a pilot boards, with relative hull movements causing it to part. 9.1.1 Pilot Vessel - Manning All launch masters hold Inshore Launch Master qualifications and undergo a formalised training programme based on the NZQA National Certificate ‘Pilot Launch Operations’. This involves at least 28 training days and a minimum of 50 transfers, half of which are carried out during the hours of darkness. Launch masters are also required to demonstrate familiarity with the harbour by completing a blank harbour chart to near Pilotage Exemption standard (the characteristic of lights, soundings etc). In common with other areas of marine personnel, the majority of launch crew have been drawn from shipping backgrounds and are qualified AB’s in addition to holding Launch master qualifications. 17 On occasion, this may also occur in the channel in emergency situations when a pilot launch is unexpectedly unserviceable Greater Wellington Regional Council / CentrePort Ltd Page 59 of 102
Report No: 05NZ104 WELLINGTON HARBOUR Issue: Issue 1.1 Operational Risk Assessment 9.2 TUGS CentrePort operates three Voith Schneider water tractors, KUPE, NGAHUE and TOIA. These have approximately 24 tonnes18 static bollard pull in direct mode, with around 50 tonnes if used in indirect mode (this option is infrequently used in practice19 ). These tugs were built directly for the Wellington Harbourboard and two entered service sequentially around 1971, the third (NGAHUE) six years later. They were procured to satisfy a shiphandling role and a capability need for emergency assistance or rescue and salvage response to a vessel at or close to the entrance in distress. The emergency assistance rescue and salvage need was identified out of the WAHINE enquiry, following this vessel’s foundering at the harbour entrance, April, 1968. Procurement was rapid following recommendation from the enquiry judge. The harbour tugs then in service had proven unsuitable for rendering assistance to a large vessel in severe weather conditions. Wellington’s tugs are now in the order of 35 years old, but with high maintenance attention, availability has been 100%. 80% of all ship handling involves two tugs. The three tugs are of similar design. KUPE and TOIA have fire fighting monitors and carry sufficient foam for approximately an hour. These two have capability and accommodation facilities for coastal towage. Tugs are vital to the movement of large vessels at Wellington, given the sudden deterioration in weather conditions that can occur. 9.2.1 Manning and Training Each tug is manned by three persons dedicated to tug operations; a tugmaster, an engineer and a deckhand. This is one more than in some parts of New Zealand20. These work on a 48 hour on/off basis. Training is to a high standard and deck crew are AB qualified with relief or extra crew drawn from AB qualified lines personnel. Most deck crew and at least one engineer have ILM qualifications. A trainee tugmaster would undergo a 18 Tugs have a design bollard pull of 28 tonnes, but factors associated with age and normal line losses during towage result in the suggested data. 19 The prospect of active escorting by Tug through Wellington harbour entrance was raised by Tanker stakeholders. Authors have been involved with escorting at Milford Haven, another unforgiving entrance and like Milford Haven; the Wellington entrance is too narrow for effective active escorting intervention once a vessel is committed to entry. 20 A Safety Risk Assessment found when the tugs were fitted with modern winches that three man crewing was essential given the frequent rough sea operations in the harbour. Greater Wellington Regional Council / CentrePort Ltd Page 60 of 102
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MARICO Marine NZ Limited WELLINGTON HARBOUR PORT AND ...

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