Since it docked in Israel, the Tanin has undergone a series of tests and been equipped with Israeli weapons, communications, and intelligence systems. At 68 meters (223 feet), the new submarine is longer than the others in the navy’s fleet. Its size allows it to be fitted with fuel tanks that let it move noiselessly and remain submerged for longer than the other submarines can.

The Tanin is the first air-independent propulsion (AIP) class submarine acquired by the Israeli Navy. The German-made vessels are capable of submerging for extended periods of time.

According to foreign reports, AIP-class submarines can carry long-range torpedoes and are expected to give Israel second-strike capability in the event of a nuclear attack.

The navy’s fifth submarine, the Ahi Rahav, is slated to arrive from Germany a few months from now, followed by a sixth submarine, most likely in 2018.

Tanin commander Lt. Col. G (submariners’ names are classified) said on Sunday that “the number of missions we need to carry out is greater than our capability because of the shortage of submarines. We train the best fighters in the most professional way, because the smallest mistake by a crew member can at best cause a mission to fail and at worst allow the sub to be discovered and become vulnerable.”

Photo courtesy: Israel Navy

Haifa Naval Base commander Col. David Salma said that “[Israel’s] submarine fleet operates deep in enemy territory — secretly, efficiently, and lethally.”

Meanwhile, Israeli Navy officials are hoping that a deal to purchase four naval vessels for ongoing security patrols at the nation’s offshore gas rigs will be closed quickly and that the German-manufactured vessels will be delivered to Israel within three years.