Vessel located by requesting constant GPS updated cordinates as light was fading fast and setting sun proving visibility difficult. Vessel successfully located using this technique.
Links:
[1] http://coastguardmana.org.nz/users/mark-presling
[2] http://coastguardmana.org.nz/users/peter-tse
[3] http://coastguardmana.org.nz/crv/crv-trust-porirua-rescue