Resources required for Submarine upgrades

The Submarine can discover underwater treasures. Look for dive locations on the map, and send the submarine on missions. Upgrade the Submarine for deeper dives that yield greater rewards.

The Submarine in Boom Beach gives you the ability to discover underwater treasures. On your map you can find several Dive Locations, they are marked by a yellow buoy. Each Dive Location gives you a couple of targets to pick from. Be careful which targets you choose, you can’t retrieve all the treasures from a Dive Location. Each treasure can hold Diamonds, Resources or Power Stones for your Sculptor.

Submarine Tips :

1.     You can unlock the Submarine at HQ level 9.
2.     Search your map for Dive Locations, they are marked with a yellow buoy.
3.     Upgrade the Submarine for deeper dives with greater rewards.
4.     Be careful with picking you targets on each Dive Location, you can not recover all treasures and also you cannot able to cancel.
    

Level	Max Dive Depth	Upgrade Cost Wood	Upgrade Cost Stone	Upgrade Cost Iron	Upgrade Time	HQ Level	Xp Gain
1	600	50000	12000	3200	2h	9	1
2	700	57000	13500	3600	3h 15m	9	1
3	800	99000	24800	8000	5h	10	8
4	900	134000	49000	14000	6h	11	12
5	1000	201000	95000	24800	7h	12	14
6	1100	284000	171000	49000	8h	13	15
7	1200	390000	340000	95000	10h	14	17
8	1300	670000	510000	187000	12h	15	20
9	1400	950000	850000	370000	12h	16	22
10	1500	1350000	1110000	700000	14h	17	26