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 outer limit of the present Pilotage Jurisdiction is an arc of 3NM radius centred on Outer Rock. Three designated boarding areas, A, B, C are located on this arc, each of which is relevant for boarding in different sea or weather conditions. However, the outer limit of jurisdiction is not the commencement of compulsory pilotage; this commences at a line running from Point Gordon through the Rear Lead to the eastern shore (depicted on Figure 4). Vessels over 500 tonnes, unless a valid pilot exemption certificate is held by the master, must proceed under the advice of a pilot northward of this line. 4.1.1 Code Application Assessment With the Wellington area of Bylaw Jurisdiction remaining at a steady 3 miles off over its coastline, there is a slight anomaly with its alignment to Harbour limits. However it is the pilotage area jurisdiction which is relevant to a Code Application Assessment. This is dealt with in the Pilotage section of this report and recommendations for a solution are referenced in the risk control section. As there were no issues other than pilotage and traffic management in the approaches (which could also be undertaken under a change to pilotage jurisdiction), the Code Application assessment came to a rapid conclusion that the Regional Council had already taken powers beyond the charted line of the harbour limit and that the preliminary considerations could not provide evidence to make a change of Bylaw jurisdiction (if they did the Regional Council would be impinging on Cook Strait). Although Gazetted at Wellington (see paragraph above) marked harbour limits in New Zealand have no legal authority2 and the point at which the Regional Council sets its Bylaw limits is the point at which a vessel enters an area of navigation regulated by local rules. Modifying the harbour limit to the Bylaw limit would be a worthless exercise as it would create a harbour of varying limit all around New Zealand! Leaving the Harbour line in its present position would allow an option to introduce a regulatory charge to fund Harbour Regulation and movement facilitation. The Code Application Assessment is a requirement of the Risk Assessment Methodology that did not appear to provide benefit to this project. However, in the detail of the risk assessment, issues were identified to recommend 2 This is an area where New Zealand Law in modifying the harbour Regime has deviated from practices established worldwide. The Harbour limit was the basis within which the body empowered to provide navigational regulation and facilitation could charge for the cost of supplying the service. It required marking on the Chart so transiting vessels were aware that regulatory charges were due on crossing the line of harbour limits and that Bylaws applied within those limits. The New Zealand system requires a Regional Council (in its role as Harbour Regulator) to decide on a location offshore at which its Bylaws apply. Thus technically, there are no longer harbour limits –a most confusing situation for the International Mariner to comprehend! Greater Wellington Regional Council / CentrePort Ltd Page 15 of 102
Report No: 05NZ104 WELLINGTON HARBOUR Issue: Issue 1.1 Operational Risk Assessment modification to the MNZ Pilotage Jurisdiction. Recommendations are in section 13.5, dedicated to pilotage. 4.2 WELLINGTON HARBOUR – CLIMATOLOGY Wellington is well known for its windy conditions, which affect both navigation and tug power needed for berthing. The Cook Strait creates a natural wind funnel by providing a narrow break in the mountain chain running down the axis of the North and South Islands, which gives the Wellington area its frequently windy environment. Statistics are readily accessible and the following is relevant to this risk assessment. • Wellington averages 173 days a year with wind gusts exceeding 32 knots; • There are an average of 22 days per year where mean wind speeds exceed 40 knots; • October is the windiest month with a mean of 27 days where wind speeds exceed 15 knots, with 19 of these days where the wind speed exceeds 20 knots (October to January are the most windy months); • July is the calmest month with a mean of 21 days where wind speed exceeds 15 knots (February to July are the least windy months). Winds categorised as gale force and above (i.e. 33 knots and over) are therefore common in Wellington. Greater Wellington Regional Council / CentrePort Ltd Page 16 of 102
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