STEAM SLOOPS—7.
| Lackawanna | 9 | guns, | 1,533 | tons. |
| Ticonderoga | 9 | " | 1,533 | " |
| Shenandoah | 9 | " | 1,378 | " |
| Monongahela | 9 | " | 1,378 | " |
| Sacramento | 9 | " | 1,367 | " |
| Juniata | 9 | " | 1,240 | " |
| Ossipee | 9 | " | 1,240 | " |
STEAM GUNBOATS—28.
| Puritan (iron-clad). | 4 | guns, | 3,265 | tons. |
| Tonawanda | 4 | " | 1,564 | " |
| Tecumseh | 2 | " | 1,034 | " |
| Onondaga | 4 | " | 1,250 | " |
| Ascutney | 8 | " | 974 | " |
| Agawam | 8 | " | 974 | " |
| Chenango | 8 | " | 974 | " |
| Chicopee | 8 | " | 974 | " |
| Eutaw | 8 | " | 974 | " |
| Iosco | 8 | " | 974 | " |
| Mattabeeset | 8 | " | 974 | " |
| Mingoe | 8 | " | 974 | " |
| Mackinaw | 8 | " | 974 | " |
| Metacomet | 8 | " | 974 | " |
| Otsego | 8 | " | 974 | " |
| Pontoosac | 8 | " | 974 | " |
| Sassacus | 8 | " | 974 | " |
| Shamrock | 8 | " | 974 | " |
| Taconey | 8 | " | 974 | " |
| Tallapoosa | 8 | " | 974 | " |
| Wateree | 8 | " | 974 | " |
| Wyalusing | 8 | " | 974 | " |
| Lenape | 8 | " | 974 | " |
| Maumee | 4 | " | 593 | " |
| Com. Morris | 1 | " | 532 | " |
| Com. McDonough | 6 | " | 532 | " |
| Calhoun | 4 | " | 508 | " |
| Com. Hull | 3 | " | 376 | " |
IRON CLAD OCEAN GUNBOATS—22.
| Dunderburg | 10 | guns, | 5,019 | tons. |
| Dictator | 2 | " | 3,033 | " |
| Monadnock | 4 | " | 1,564 | " |
| Miantonimah | 4 | " | 1,564 | " |
| Agamenticus | 4 | " | 1,564 | " |
| Canonicus | 2 | " | 1,034 | " |
| Manhattan | 3 | " | 1,034 | " |
| Mahopac | 2 | " | 1,034 | " |
| Manayunk | 2 | " | 1,034 | " |
| Catskill | 2 | " | 844 | " |
| Camanche | 2 | " | 844 | " |
| Lehigh | 2 | " | 844 | " |
| Montauk | 2 | " | 844 | " |
| Nantucket | 2 | " | 844 | " |
| Nahant | 2 | " | 844 | " |
| Patapsco | 2 | " | 844 | " |
| Passaic | 2 | " | 844 | " |
| Sangamon | 2 | " | 844 | " |
| Weehawken | 2 | " | 844 | " |
| Moodna | 2 | " | 677 | " |
| Marietta | 2 | " | 479 | " |
| Sandusky | 2 | " | 479 | " |
IRON CLAD RIVER GUNBOATS—12
| Catawba | 2 | guns, | 1,034 | tons. |
| Tippecanoe | 2 | " | 1,034 | " |
| Chickasaw | 4 | " | 970 | " |
| Kickapoo | 4 | " | 970 | " |
| Milwaukee | 4 | " | 970 | " |
| Winnebago | 4 | " | 970 | " |
| Tuscumbia | 3 | " | 565 | " |
| Ozark | 2 | " | 578 | " |
| Osage | 2 | " | 523 | " |
| Neosho | 2 | " | 523 | " |
| Indianola[8] | 2 | " | 442 | " |
| Chillicothe | 2 | " | 303 | " |
The most formidable class of these unfinished vessels are the iron-clad gunboats. Of these are four of immense size, viz., the Puritan, Tonawanda, Tecumseh, and Onondaga. The mammoth iron-clad of all is the enormous Dunderburg, carrying 10 guns of from fifteen to twenty inches in calibre, and having a tonnage of 5,019 tons. The Dictator is another immense iron-clad. Of the river Gunboat Fleet, the Catawba and Tippecanoe stand as first class, carrying heavy nine and eleven inch Dahlgren guns.
The building of these ocean iron-clads is at the following places: Nine of them are building at New York; three at Brooklyn; one at Portsmouth; two at Jersey City; four at Boston; two at Chester; two at Pittsburgh; one at Brownsville, Pennsylvania; and one at Wilmington, Delaware. The river iron-clads are built at the following places: Five at Cincinnati; six at St. Louis; and one at Mound City, Illinois. Of the first-class steam gunboats, eleven are building at New York; four at Boston; two at Portland, Maine; two at Portsmouth, New Hampshire; one at Bordentown, New Jersey; one at Brooklyn; two at Philadelphia; one at Chester; and two at Baltimore, Maryland.