The Coastguard Mana base is beside the boat launching ramp at Mana Crusing Club [1] near Ngatitoa Domain. We can be found at the following grid reference:
Latitude: S 41°5'57" or -41.099
Longitude: E 174°51'58" or 174.866
Links:
[1] http://www.manacc.co.nz/