Ray
As Scott mentioned, there are two entrances to the Tamaki Estuary to get to Half Moon Bay; one via Musick Point and the other via West Tamaki Heads. The area is well charted but I'd recommend you sticking to one of the two channels for deepest water. Musick Point has a CD of 1.2m at the lowest point and West Tamaki Heads has a CD of 1.8m so you will need to watch the tides if you draw 2.4m. Make sure you follow the channel markers as the channel does take a dog leg around a large sandspit that many a boat has parked up on trying to take the direct line of sight route.
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