Very worrying development to be honest.
Tariq Masood is a Deobandi alim who has spoken against the practices of other groups particularly the Barelvi school.
For evidence please see his lecture on how celebrating the birth of the Prophet(saws) is a biddah and not permitted.
Now bare in mind that the Mliad is a national holiday and there are refutations against what is being said, which I won't get into.
Here is another video;
How can such a polarising figure be allowed to come and speak at the armed forces of a nation which are meant to represent all? Why don't we see Imams from other fiqh allowed?
I'm sorry people have had grave concerns about the navy in the past, and there have been purges and investigations but this will make people edgy.
They could have for example invited people like Maulna Tariq Jameel saib, who is a very well respected Deobandi alim and who has done fantastic work in bringing al schools of thought together as Muslims and united Pakistanis. But this move is simply strange and at odds with many things.