Attack Submarine

Unit showcase:
The attack submarine is a submerged sea unit that can either dive up to the surface to attack ground and aerial targets or dive and submerge to engage in naval ships. It is part of the submerged sea units and is the successor of the underwater probe and the predecessor of the heavy submarine

Just the stats:
HP: 260

Speed: 0.80

Attack: 42/3s

DPS: 14

Range: 250

Price: 800

Production time: 16.7s

Produced in Sea Factory at T1

Targets:

(While Surfaced): Ground, Air, Sea

(While Submerged): Sea, Submerged

Abilities:

Surface: Allows the attack submarine to surface up and attack both ground and air targets

Dive: Allows the attack submarine to dive and use torpedoes against other sea units

Assessments
Pros: Cons:
 * Can outrange up to T2 turret when surfaced
 * Can harass undefended landing crafts and battleships when submerged
 * Able to attack aerial units when surfaced
 * Can use micro to perform a surface attack, and then dive to avoid being targeted by aerial units and ground units
 * Outranged and easily countered by missile ships, heavy battleships and T2 submerged units when submerged
 * Hovering units cannot be attacked when submerged (Can be especially countered by combat engineer)
 * More prone to attacks when surfaced

Strategies and counters:
Strategy:

The attack submarine is a flexible and cheap early game unit that can be used to siege turrets and gain naval superiority with the battleship and missile ship. Harass ships that lack anti sub capabilities and surface to outrange defences.

Counter:

Early Game Mid Game onwards:
 * When submerged, use missile ships to kite and hard counter it, if not fight fire with fire and use the same units against them
 * When surfaced, use hovering units such as hovertanks to encamp and destroy it.
 * The combat engineer, a hovering unit, has its own torpedo system, allowing it to counter and attack the attack submarine regardless whether it is submerged or surfaced, making it a good counter
 * The amphibious jet can also dive to attack submerged submarines and fly to attack its surfaced form, also making it a good counter to the attack submarine.

Later on, by the time you have a T2 Sea Factory, you can produce a variety of T2 ships, most of them (other than the heavy missile ship) can target submerged units by firing torpedos, making it easier to counter and destroy the attack submarine.