Q.is it ok to use erasable pen in writing on deck logbook/ official logbooks?

Anything that can be erased and rewritten without getting noticed cannot be an acceptable means of writing deck logbook or official logbooks.

So the log books cannot be written with an erasable pen.

Even if something needs to be corrected in the log book, it needs to be done by striking the erratic content with one single line in such a way that the text can be read even after striking it.

The whole idea of the log book records is that no one should be able to amend it at their will without such changes getting noticed.

It is also required that if any line is left blank in the log book, it should be stricken down with a line so that it is not able to be used later for writing something.