Based in the Mid and West Wales region of Scotland.
SR89 is within the post town of Pembroke, Pembrokeshire.
The square is within Sir Benfro - Pembrokeshire council.
The SR89 national grid square measures 10 km by 10 km and has an area of 1,000 kilometres squared.
The technical term for a 10 km map square is a Hectad.
When this 10 km square is divided into a grid 10 by 10 it gives the next size of grid square. This unit is called a Monad and measures 1km square. 100 monads fit in a 10km square.
Out of the monads generated from square SR89, 26 are land and 74 are sea. Sea squares are disregarded on this site as they contain no land features.
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| Corner | Latitude | Longitude | Easting | Northing |
|---|---|---|---|---|
| South West Corner | 51.565858 | -5.182009 | 180000 | 190000 |
| South East Corner | 51.565858 | -5.031667 | 190000 | 190000 |
| North West Corner | 51.659459 | -5.182009 | 180000 | 200000 |
| North East Corner | 51.659459 | -5.031667 | 190000 | 200000 |