The approach to Marsden Point has a shallowest depth of 14.7m at chart datum between the Fairway Buoy and No 1 buoy. The least width of 190m is between No 3 and No. 6 buoys. Tidal streams are strongest in the area of No. 7 buoy where rates up to 3 knots may be experienced.

For vessels proceeding to Northport's No. 1 and 2 berths the controlling depth is 13m at chart datum and for No.3 berth it is 14.5m. The swinging basin has a maximum width of 420m. For vessels proceeding to the Northport Limited Marsden Point Jetty berth the controlling depth is 7.8m at chart datum.

From One Tree Point up to Whangarei the channel is shallower and narrower with a charted channel minimum depth at chart datum of 7.0m. The minimum width for most of its length is 90m.

The minimum charted depth to Portland is 4.7m at chart datum.

16.0 NAVIGATIONAL AIDS

The port is well lit with buoys, beacons and leading lights. Vessels may enter by day or by night. There is no shore based radar control of vessels. Any issues associated with navigation aids on the harbour should be reported to Whangarei Harbour Radio - VHF Channel 19 - Ph: (09) 432 5018.

17.0 WAVE RIDER BUOY

There is a wave rider buoy situated on the starboard side of the channel midway between the Fairway buoy and No 1 buoy. It is marked with an orange flashing light. Vessels should not attempt to enter / leave the channel  between the Fairway Buoy and No 1 buoy.