So I have been looking at what ships Navy has ordered already or currently building and how much tonnege will it add to navy.
Here is what I found
Submarine 2 more arihant class are building
7000*2 == 14000 tons.
3 S5 class SSBN == 13500*3== 40500tons.
6 SSN == 6000*6 == 36000 tons.
3 more scorpion== 1800*3== 5400 tons.
Ships.
Vishakhapatnam class 1 more buildings (3 already in service) == 7300 tons.
Nilgiri class 7 launched= 7*6670== 46690 tons.
Talwar class 4 building== 4*4035==16140 tons.
Asw-swc =16*900== 14400 tons .
Ngmv == 6*2200== 13200 tons.
Multi purpose vehicle under construction
2*3750== 7500 tons.
Ngopv== 11 * 2500== 27500 tons.
Fleet replenishment== 5*45000==225000 tons.
Survey vessel== 4*3300== 13200 tons
Nistar class driving support vessel ==
2*9350 == 18700 tons.
Apart from them small crafts and boats whose tonnege is under 500 tons. so not mentioned or counted.
This adds to 485530 tons currently on confirmed order or under construction already.
Next big orders could be
8 next gen Corvette @ 2800 ton each== 22400 tons.
6 p75i @ 2000 tons == 12000 tons .
Next carrier 50000 tons .
Lpd / lhd == 4*40000 == 160000 tons.
Etc. So almost 250000 tons in pipeline to be order in next 5 years by then next gen destroyer and follow on frigates will also be ordered.
All in all in next 15 years Navy will add atleast 800000 tons to its weight at the very least .
But since naval capex has started growing faster now navy might actually add much more than this .
Will keep updating it as new orders are confirmed.