Marines are basically a force which lands on another country for purpose of Elimination of known threat, using Sea route in most cases.
It's when ground invasion will yield tactical advantage
Also carrying out operations on Large Sea ships , Fuel Ships or Enemy Ships
The most minimum level of Force is conceptually locked to Sea port cities
on Own soil, this is where our Pakistani Marine force concept is
However in order to be have impact , need special Transport Ships or Helicopter Carrier fleet to transport 5,000-10,000 Troops to mission Location
- Helicopter Carrier
- Armed drone
- Transport capacity of Jeeps , APC
- Smaller Transport boats attachments
- Troop Deployer Ships near shore
Often Marines have to be adaptable to Sea/Beach environment
or Greater degree of comfort around water , or tactics suited
to Survive
It's operation are mostly different then the plain Army role which is focused on Land Operations in own country or Land route progression
I think Pakistan has never really expanded the ideal Ships which can serve the Marine concept in Pakistan
The whole Hover craft tactical ships are nice , but these are just one of the available transport options