Early Submarine

Submarine history started when English Mathematician, William Bourne sketched his idea into a blueprint in 1578. In 1620, Dutch designer, Cornelius van Drebbel started the development of submarine by built-up a small wooden ship covered by waterproof skin. It's equipped with air hose to the surface.

He successfully traveled under water for three hours in Thames river. First submarine for military was built by American, David Bushnell in 1776.

Explorer of The Seas

Ship Stats
Launched: 2000
Passengers: 3114
Registry: Bahamas
Tonnage: 138,000
Crew: 1180
Decks: 14

source : CruiseCritic.com

Queen Mary 2

The RMS Queen Mary 2 (QM2) is a Cunard Line ocean liner named after the earlier Cunard liner Queen Mary, which was in turn named after Mary of Teck. At the time of her construction in 2003, the QM2 was in every dimension the largest passenger ship ever built. She will lose this title to Royal Caribbean International's Freedom of the Seas in May 2006, but she will remain the largest ocean liner (as opposed to cruise ship) built. [wikipedia]

General Characteristics
Tonnage:	151,400 gross tons
Displacement:	76,000 tonnes (approx)
Length:	345 m (1,132 ft)
Beam:	41 m (135 ft) waterline, 45 m (147.5 ft) extreme (bridge wings)
Draft:	10 m (32 ft 10 in)
Height:	72 m (236.2 ft) keel to funnel (includes 17 passenger decks)
Power:	157,000 horsepower (117 MW) GE LM2500+ gas turbine/diesel electric plant
Propulsion:	Four 21.5 MW pods: 2 fixed and 2 azimuthing
Speed:	approximately 30 knots (56 km/h)
Complement:	2,620 passengers, 1,253 officers and crew
Cost:	UK £460 million (approx US $800)