Okay guys I have found the info that I needed.
what you need to do if you have the sea pathfinder like I do, you will need to hold down the top left button (adjust) then you will be able to change the time.
press the top left button again (adjust) than you will see GMT.
You can change this by pressing the top right button COMP or the bottom left button START to change the values
press MODE to toggle between GMT, LON and INT
for my area I had to input + 2.0 (GMT) and 22' East (LON) and 3:17 (INT)
Below is the intervals for the most important coastal destinations:
Inhambane +2 GMT 36ºE LON 5:26 INT
Xai-Xai (Inhaca) +2 GMT 34ºE LON 4:16 INT
Durban(N&S Coast, +2 GMT 31ºE LON 4:05 INT
East London)
PE(Cape St. Francis) +2 GMT 26ºE LON 3:33 INT
Mossel Bay +2 GMT 22ºE LON 3:17 INT
Simon’s Town +2 GMT 18ºE LON 2:43 INT
(Stuisbaai, Saldanha)
Swakopmund +2 GMT 15ºE LON 2:27 INT
I had a look at the tides and it looks pretty accurate.
enjoy guys.