Seat with a View - Kirsa Jensen Memorial Mystery Cache

Another cache in my "Seat with a View" series.

If you go the given co-ordinates, you will find a lovely Seat with a View, the view is out across the Sea towards Cape Kidnappers. On a clear day you can also see Mahia to the North.

It is a nice spot to sit and figure out where the final coordinates of the cache, which is within a 20 minute walk from here.

This is the location of a memorial to Kirsa Jensen.  Kirsa Jensen was a 14-year-old of Colenso High School when she vanished on September 1, 1983. This was the last spot she was seen alive.. 
While horse Commodore was left tethered by the abutment, a huge search and police inquiry found no trace of Kirsa. No arrests were made, a witness who became a suspect took his own life, and the police file remains open. 

Please use the following to help you figure out the final coordinates:

S39 33.(556QK0GN26565QK)

E176 55.(AFGX5DW5DPWD5PD)