The Alpino is about 472 feet long, about 65 feet wide, has about a 17 foot-draft, and a total displacement of 6,500 tons.
Source: Fincantieri
The ship accommodates about 200 people, and has a full load displacement of about 6,500 tons.
Source: Fincantieri
As you can see, the ship has a lot of angles and is rather stealthy. Not as stealthy, as say, the new Zumwalt destroyers, but stealthy nonetheless.
And here's a shot from the bridge looking onto the bow. Although we weren't allowed on the bow, you can see the 16 multi-functional VLS missile tubes situated behind the 76mm Oto-Breda gun.
The Alpino we toured was operated by the Italian Navy (Fincantieri is an Italian company), and therefore if the US purchases the Alpino design, it will equip the ships with its own systems.
The US has already decided that the two 76mm guns on the bow and stern will be replaced by 57mm Mark 110 guns, and that there will be 32 multi-functional VLS tubes instead of 16.
The US has not yet determined which other systems will be onboard, but Hunt said that the Navy might even consider putting high-energy lasers or a rail gun on the frigate.
Source: Fincantieri
It can also carry four to eight Teseo Otomat Mk-2/A anti-ship and land attack missile tubes.
Source: Fincantieri
The Alpino is basically a hybrid, powered by one 32 megawatt gas turbine engine and two 2.2 megawatt electrically powered engines, bringing the ship to a maximum speed of more than 31 mph.
Source: Fincantieri
As an anti-submarine warfare ship, the Alpino has a variety of sensors, including the main Thales variable-depth sonar seen below, which is deployed into the water through the door in the background.
Here's a better shot of the Thales sensor (the yellow part), and the door through which it is deployed.
And this is the towed array sonar, which uncoils into the water much like a radio antenna.
The ship also has air and surface search radars, and commercial radars.
The Alpino also has a modern damage control system, with multiple cameras and damage control monitors throughout the ship, an atomized demineralized water sprinkler system and more.
Here's one of the two hangar bays, which can hold NH-90 or EH101 helicopters.
The US, however, has required the frigate it chooses to be able to hold one MH-60R Seahawk helicopter, while the other hangar bay will probably be used for unmanned aerial vehicles.
And lastly, here's a shot of the flight deck from the control tower.
The US will award the contract to one of the five ships in 2020.