MARICO Marine NZ Limited WELLINGTON HARBOUR PORT AND ...

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Report No: 05NZ104 WELLINGTON HARBOUR Issue: Issue 1.1 Operational Risk Assessment The area is subject to heavy gusts off high land and funnelling down gorges (Ngauranga and Kaiwharawhara) which affect small craft, particularly those under sail, and also larger vessels manoeuvring in strong winds8. 5.4.3 Area C - Tidal Regime No significant streams occur in the harbour, the exception being flow from the Hutt River, particularly during floods. This is reported to cause short steep waves locally in conjunction with gale events. 5.4.4 Area C - Navigational Use The area is not under radar monitoring or visual surveillance from Beacon Hill. Large vessels transit Area C whilst in or outbound and the area also includes the Rail Ferry Terminal, Thorndon Container Terminal, Aotea Quay and Seaview Oil Terminal; all major wharf and berth facilities. Seaview has a lack of reference points in the approach, making berthing recommended by pilots with significant experience only. Seaview is also affected in a southerly gale and the short seas which form can affect tug ability to push on. As the Seaview jetty is not aligned with the wind direction in a southerly, misjudgement on an approach has the potential to result in a serious incident. The harbour ferry regularly transits across Area C, operating a service from Lambton Harbour to Days Bay wharf and also to Matiu/Somes island several times a day. Thorndon Container Terminal is interesting in that its geographical layout places the berth face approximately parallel with winds from the south or north (the predominant patterns). Large vessels alongside are thus mostly head or stern to wind and pilots are adept at using wind loading on the hull plane for berthing or departing. Large vessels transiting the harbour are generally following the Recommended Tracks (see Figure B1, Annex B and section 11.2.2). These tracks occupy the south western part of Area C. However tankers and tugs routinely transit across the area to and from Seaview oil terminal, and occasionally passenger vessels will transit the harbour outbound along the Hutt Motorway and to the north of Matiu/Somes Island. Leisure craft of all types may be encountered in Area C, including keeler yacht races throughout the area, fishing craft and kayaks along the shorelines and around the islands and all types of leisure craft transiting 8 Large Vessels may need a speed of 8 knots to be responsive to the rudder in these conditions. Greater Wellington Regional Council / CentrePort Ltd Page 37 of 102
Report No: 05NZ104 WELLINGTON HARBOUR Issue: Issue 1.1 Operational Risk Assessment between marinas, launching ramps and other harbour areas. Seaview marina, located in the NE of Area C, has floating berths for around 130 craft of up to 20 metres length and parks for 150 trailerable craft, as well as a popular launching ramp. A keeler yacht club, Lowry Bay Yacht Club is based in the marina and holds races on the Eastern and Northern areas of Area C. Centreboard yachts clubs are also active along the Petone foreshore and also at Eastbourne. Other organized activities are the Sea Cadets, a water ski club and a rowing club, all operating along the Petone foreshore or northwest corner of the harbour, and generally clear of large commercial movements. A water ski access lane is provided in the northwest corner of Area C and no problems are reported between different users in this area. 5.4.5 Area C- Navigational Issues of Note The main stakeholder feedback arising out of consultation concerned the main harbour area. These are summarised as follows: • Yacht races being set across recommended tracks; • General leisure craft impeding passage of larger vessels; • Large vessels ‘cutting corners’ of tracks and navigating close to the Miramar peninsula where leisure users are operating or small commercial/fishing vessels are transiting, or are at anchor – a sail training vessels routinely anchor here on visits to Wellington and have been in close quarters situations with transiting ferries; • Background shore lighting, particularly from the port and Hutt Motorway making it difficult for craft and vessels to detect one another by night; • Kau Bay is a multi use area particularly in southerly conditions when it is well sheltered. It is a popular place for leisure craft to anchor, for shore diving, kayaking and there is a water-ski lane; • Debris derived from the Hutt River during heavy rainfall presents a hazard to small craft and may damage small commercial vessels such as fishing vessels or the harbour ferries. • Conflicts with anchored vessels. There are a number of incidents of note in this area relating to berthing contacts. A fishing vessel tied up alongside Aotea Quay was lost through heavy contact with a ferry manoeuvring in adverse weather without tug assistance. There was a close-quarters situation involving a tanker and ferry in 2005 and there have also been a number of vessels dragging anchor in the changeable weather conditions prevailing in the harbour. Greater Wellington Regional Council / CentrePort Ltd Page 38 of 102
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MARICO Marine NZ Limited WELLINGTON HARBOUR PORT AND ...

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