Student or Learner
The folowing sentence is a description of the Iranian coast of Persian Gulf. The werds printed in bold are problematic. I dont know its exact meaning. Can "not" be a misprint for "note"? It is from a book published nearly 115 years ago.
The shoals of Kane are certainly those of Ras-al-Mutaf, near whose northern end is Ras-al-Khan- not that this name matters much in their identification, which depends on position.
Thanks very much.
"Not" is correct.
Not that it matters = It doesn't matter
In this context, it means that the name is not important.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.