Tikore Puzzler 6

The cache is not at the posted coordinates. solve the puzzle below, Enter the key number/word into certitude to find the correct coordinates

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Across
1. 5 across minus twelve
3. 22 down minus fifteen
5. 9 across divided by eight
7. 25 across minus thirty-six
8. 16 across times 29 across
9. Four times 23 down
11. 11 down minus six
13. 14 down minus 106
15. 9 across divided by eleven
16. 29 across plus forty-nine
17. 1 across times six
20. 9 across times two
22. 13 across plus seventeen
24. 8 across plus 966
25. 3 across times three
27. Millimetres in three centimetres
28. Millimetres in ten centimetres
29. A square number

Down
1. 24 down minus two
2. 27 across times 28 across
3. 29 across times nine
4. 11 across plus twenty-four
5. 18 down plus 639
6. 15 across plus ten
10. 9 across divided by eleven
11. 8 across divided by five
12. 3 down times two
13. Three times 26 down
14. Centimetres in four metres
18. Grams in five kilograms
19. 12 down divided by eight
21. 5 down plus 2394
22. A square number
23. Millimetres in 11 centimetres
24. 13 down divided by six
26. 27 across plus fifty-six

Enter the digits ABCDEFG in certitude to obtain the final coordinates.

You can validate your puzzle solution with certitude.

BEWARE These caches are placed (with permission) on Tikore Island Enviromental Reserve, Be very careful when walking around the Island, as birds nest all throughout the Island and the nests, eggs and chicks are very vulnerable, They camouflage in with the surroundings and are hard to spot! Please treat this location with the utmost respect.

If you wish to get in contact with the person who has granted permission to place these caches please send a message to Hal2929 Via the geocaching app/website and he will forward you the contact information

TIKORE ISLAND

The name is probably a corruption of its original Maori name; Te-Motu-Kāika-Kurì (the island where the dog was eaten) and Te Kuti.  James Spencer, Bluff's first European settler, brought the island from Chief Tohawaiki and grazed pigs there.  

Location and Access

Tikore Island is located within Bluff Harbour to the north east of Greenpoint Reserve around 500 metres offshore.  Rabbit Island is located to the north east of Tikore Island.  Access can only be gained by boat.  Although the Island can be accessed at any tide I highly recommend going at LOW tide as it makes travelling around the island a lot quicker and easier.

Amenity Value

Tikore Island provides scenic amenity and historical value to the residents of Bluff and Invercargill.  These values should be protected as a representation of the environment that would have existed in the past.

Highly visible from the State Highway, this island is a significant landmark in the Bluff Harbour.

Recreational Use

Due to accessibility issues, Tikore Island offers minimal recreational opportunities for the residents of the region.  The Island is appreciated instead for natural, historical and scenic values.  These values take precedence over recreation on the Island.

CO RANT ON ETHICS.

I have an issue with cachers not solving a mystery cache and just looking for it at random because the cache had to be in a set area as are these caches. Particularly for the FTF. This practice started in Otago and appears to have drifted south. Caches are sensitive creatures and I would like to see them solved by the FTF cachers after that anything goes.  

I know that cachers all do it differently and that I should let it go and "Suck it up Buttercup" but I will not. I was told that there is not much I could do about it. But there is something I can do. If the FTF cacher is not on the solved list I will cease to publish any more caches. 

Placing these caches was a joint effort between Hal2929 and THENINJAWITCH_NZ, both parties have signed the caches as HTH (Helped to hide) and will log the other hider's caches as found once FTF has been claimed.