Steamer or Steamship

Steamer is an early term for any vessel power by a steam engine rather than sails.

Shipwreck Delaware
The Delaware, an 1880s screw steamer

Early steamers were propelled by large paddlewheels. "Side-wheelers", with the paddlewheels on each side, were more seaworthy, and therefore more common in ocean waters, while "stern-wheelers", with a single large paddlewheel at the back, were more common as riverboats. Later, these were replaced by more efficient screw (or propeller) vessels.

Shipwreck Black Warrior
The Black Warrior, an 1850s side-paddlewheel steamer. There are no stern-wheelers in the region that I know of.
Click
This sketch of the Delaware shows the remains that you can expect to find of such a vessel.

Of note is the universal pattern of:

< bow - boilers - engine - drive shaft - propeller - rudder/stern )

and the fact that the boilers are always in front of the engine. Identify any one of these features on the wreck, and you can orient yourself in even the murkiest conditions.

Shipwreck Delaware boiler
Boilers on the Delaware. In the foreground is an intact one. Next to that is a collapsed one; there are four altogether. In the background is the engine.
steam engine
An old postcard of the City of Keansburg, the last of the New York commuter ferries, and one of the last steamships to ply local waters - until 1968.
steam engine
One of the Keansburg's two triple-expansion steam engines, at Allaire State Park.

Shipwreck Admiral Dupont
Type:
shipwreck, steamer, USA
Built:
1847, England, as Anglia
Specs:
( 195 x 28 ft ) 750 gross tons, 50 passengers & crew
Sunk:
Thursday June 8, 1865
collision with ship Stadacona - 17 casualties
Depth:
150 ft

Shipwreck R.C. Mohawk
Not to be confused with the S.S. Mohawk or the other S.S. Mohawk.
Type:
shipwreck, revenue cutter, U.S. Revenue Service, on loan to U.S. Navy
Name:
A tribe of Iroquoian Indians of the eastern New York area.
Built:
1902, Richmond VA USA
Specs:
( 206 x 32 ft ) 980 gross tons, 77 crew
Sunk:
Monday October 1, 1917
collision with tanker Vennachar - no casualties
GPS:
40°25.025' -73°45.158' (AWOIS 2010)
Depth:
100 ft

Shipwreck General Slocum
Type:
shipwreck, barge, USA
Built:
1891, Brooklyn NY USA, as General Slocum
Specs:
( 235 x 37 ft ) 1284 gross tons, 4 crew
Sunk:
Monday December 4, 1911
storm - no casualties
Depth:
25 ft ( 30 ft, including mud )

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