Credited for sinking the massive Austro-Hungarian dreadnought SMS Szent Istvan. These fast Italian built torpedo boats featured converted aero engines that gave them incredible speed. They were vulnerable to air attacks but were armed with some machine guns for minimal protection.

A TRUE DAVID VS GOLIATH STORY
In the Adriatic they acted together with aircraft and many times these gunboats did the main work previously inherited by destroyers, or even battleships; escorting coastal convoys and supporting infantry with naval gunfire. -the Battlefield 1 codex entry for this boat.

This actual nimble and strong boat can also be found in battlefield 1 alas in real life as well.

If you play battlefield 1 you can find it in maps like
.Empire's Edge
.Fao Fortress
.Albion
.Cape Helles
.Zeebrugge
.Heligoland Bight

Its used by all of the countries in game except the united states and france.

The M.A.S. Torpedo Boat tend to function primarily as transport and secondarily to take down the Dreadnoughts. Like the armored cars, anyone can spawn in a friendly occupied M.A.S. as long as there is room. The MAS can repair itself without a Repair tool (like normal vehicles and tanks with a repair tool enabled, one cannot take damage or else it will interrupt the process of repair.

Its primary armament are two torpedoes, operated by the driver and can be dropped in pairs, are the primary weapon most effective against other naval vessels. Torpedoes are the most affective against large vessels, namely the L-Class Destroyer and Dreadnought, although it can still kill smaller vessels like enemy Y-Lighter/MAS with proper leading. Torpedoes can still kill enemy land vehicles if they are sitting in/close to the shore.

The second seat controls the 20mm Cannon with a 180mm turning radius and is generally the same as other vehicles with the weapon. It should mostly it should be used against enemy boats and infantry. Shots at longer distance/on the move should be lead.

3/4th seat controls Heavy MGs. While least affective compared to the 2nds seat 20mm Cannon, it can still do small damage against PT boats/Y-Lighers. They are particularly effective against infantry and aircraft.

All occupants of the boat are exposed to enemy fire. Splash damage from 20mm cannons/Dreadnoughts AA Guns can take out occupants inside the boat without destroying it.

Like airplanes, the M.A.S. is able to travel outside of normal infantry bounds, though is only maneuverable on water. Unlike the maps in Battlefield 4, open water is typically out of bounds to infantry. The M.A.S. can also spawn well to the rear in Operations (Gamemode). Passengers need to be careful about where they decide to disembark, or they risk stranding themselves in certain death.

Note: this was my entry to the ai boat challenge.

Ag1 to operate back mgs, AG8 to deactivate front guns. (both mgs are auto aiming)