| Charleston Packet : 1844-1846 | | 1844 | Knowles, Thomas & Co. | Howland, Warren | New Bedford, MA | | | 716 | 34 | |
| Minerva II : 1845-1848 | | 1845 | Knowles, Thomas & Co. | Smalley, Orrick | New Bedford, MA | Indian O | | 386 | 2205 | 19500 |
| Ceres : 1845-1849 | L | 1845 | Knowles, Thomas & Co. | Adams, Mayhew | New Bedford, MA | N Pacific, S Pacific | | 440 | 2000 | 17000 |
| Charleston Packet : 1846-1848 | | 1846 | Knowles, Thomas & Co. | Besse, Alden | New Bedford, MA | South Seas | | 425 | 187 | 1500 |
| Edward : 1846-1849 | | 1846 | Knowles, Thomas & Co. | Luce, Edwin A. | New Bedford, MA | | | 1816 | | |
| Exchange : 1847-1849 | | 1847 | Knowles, Thomas & Co. | Reynolds, Joseph | New Bedford, MA | N Atlantic, S Atlantic | | 468 | 4 | |
| Charleston Packet : 1848-1850 | | 1848 | Knowles, Thomas & Co. | Lewis, Henry A. | New Bedford, MA | | | 434 | | |
| Minerva II : 1848-1851 | | 1848 | Knowles, Thomas & Co. | Smalley, Orrick | New Bedford, MA | Pacific | | 964 | 1562 | 18000 |
| Exchange : 1849-1850 | | 1849 | Knowles, Thomas & Co. | Hazard, Oliver J. (D) | New Bedford, MA | | | 90 | | |
| Exchange : 1849-1850 | | 1849 | Knowles, Thomas & Co. | Rounds, George W. (R) | New Bedford, MA | | | 90 | | |
| Falcon : 1849-1852 | | 1849 | Knowles, Thomas & Co. | Smith, Abner | New Bedford, MA | | | 84 | 2527 | 40200 |
| Hecla : 1849-1852 | | 1849 | Knowles, Thomas & Co. | Besse, Alden | New Bedford, MA | Atl & Pac | | 1226 | 150 | |
| Edward : 1849-1853 | | 1849 | Knowles, Thomas & Co. | Luce, Presbury N. | New Bedford, MA | N Atlantic, S Pacific | | 960 | | |
| Exchange : 1850-1851 | L | 1850 | Knowles, Thomas & Co. | Stewart, George W. (D) | New Bedford, MA | | | 180 | | |
| John Wells : 1850-1854 | | 1850 | Knowles, Thomas & Co. | Cross, Franklin | New Bedford, MA | Pacific | | 492 | 1639 | 59874 |
| Tamerlane : 1850-1854 | | 1850 | Knowles, Thomas & Co. | Shockley, William Irving | New Bedford, MA | Pacific | | 368 | 2694 | 45150 |
| Charleston Packet : 1851-1853 | | 1851 | Knowles, Thomas & Co. | Lewis, Henry A. | New Bedford, MA | S Atlantic, Indian | | 275 | 6 | |
| Robert Morrison : 1851-1854 | | 1851 | Knowles, Thomas & Co. | Norton, Richard | New Bedford, MA | Pacific | | 163 | 1999 | 30152 |
| Wave : 1851-1854 | | 1851 | Knowles, Thomas & Co. | Downes, Charles | New Bedford, MA | | | 448 | 62 | 800 |
| Minerva II : 1851-1855 | | 1851 | Knowles, Thomas & Co. | Reynolds, Philip | New Bedford, MA | | | 151 | 2393 | 29600 |
| Undine : 1852- | L | 1852 | Knowles, Thomas & Co. | Merry, William (D) | New Bedford, MA | | | 450 | | |
| Falcon : 1852-1855 | | 1852 | Knowles, Thomas & Co. | Gardner, Joseph | New Bedford, MA | S Pacific, W Arctic, N Pacific | | 131 | 528 | 6101 |
| Isabella : 1852-1855 | | 1852 | Knowles, Thomas & Co. | Smalley, Orrick | New Bedford, MA | S Pacific, Okhotsk, N Pacific | | 340 | 1346 | 23169 |
| Charleston Packet : 1853-1854 | C | 1853 | Knowles, Thomas & Co. | Ellis, Benjamin | New Bedford, MA | Indian | | | | |
| Hecla : 1853-1855 | | 1853 | Knowles, Thomas & Co. | Gifford, Henry F. | New Bedford, MA | | | 232 | | |
| Edward : 1853-1856 | | 1853 | Knowles, Thomas & Co. | Smith, Abner | New Bedford, MA | | | 185 | 1997 | 25361 |
| Wave : 1854-1856 | | 1854 | Knowles, Thomas & Co. | Stanton, William B. | New Bedford, MA | | | 523 | 4 | |
| John Wells : 1854-1857 | | 1854 | Knowles, Thomas & Co. | Besse, Alden | New Bedford, MA | N Pacific | | 342 | 2252 | 37006 |
| Robert Morrison : 1854-1857 | | 1854 | Knowles, Thomas & Co. | Pease, Josiah C. | New Bedford, MA | Pacific | | 152 | 1661 | 21600 |
| Tamerlane : 1854-1858 | | 1854 | Knowles, Thomas & Co. | Winslow, Joshua Baker | New Bedford, MA | Pacific | | 253 | 3418 | 26000 |
| Falcon : 1855-1859 | | 1855 | Knowles, Thomas & Co. | Norton, Shubael Claghorn, Jr. | New Bedford, MA | Pacific | | 35 | 619 | 4900 |
| Isabella : 1855-1859 | | 1855 | Knowles, Thomas & Co. | Lyon, Joshua | New Bedford, MA | N Pacific | | 238 | 1819 | 25700 |
| Minerva II : 1855-1859 | | 1855 | Knowles, Thomas & Co. | Swain, Calvin | New Bedford, MA | Pacific | | 1575 | | |
| Wave : 1856 | | 1856 | Knowles, Thomas & Co. | Hill, Leonard W. | New Bedford, MA | Pacific | | | | |
| Hecla : 1856-1859 | | 1856 | Knowles, Thomas & Co. | Smalley, Orrick | New Bedford, MA | S Pacific | | 1194 | 100 | |
| Edward : 1856-1860 | | 1856 | Knowles, Thomas & Co. | Stanton, William B. | New Bedford, MA | Pacific | | 741 | 55 | |
| Wave : 1856-1860 | | 1856 | Knowles, Thomas & Co. | Hill, Leonard W. | New Bedford, MA | Pacific | | 520 | 16 | |
| John Wells : 1857-1861 | | 1857 | Knowles, Thomas & Co. | Woodbridge, Ebenezer Hawes | New Bedford, MA | Pacific | | 169 | 1635 | 20300 |
| Robert Morrison : 1857-1861 | | 1857 | Knowles, Thomas & Co. | Tilton, Benjamin W. | New Bedford, MA | Pacific | | 215 | 1836 | 25973 |
| Tamerlane : 1858-1862 | | 1858 | Knowles, Thomas & Co. | Winslow, Joshua Baker | New Bedford, MA | Pacific | | 405 | 2141 | 22085 |
| Falcon : 1859-1862 | | 1859 | Knowles, Thomas & Co. | Mayhew, Bartlett, II (L) | New Bedford, MA | S Atlantic | | 466 | | |
| Falcon : 1859-1862 | | 1859 | Knowles, Thomas & Co. | Boyd, William B. (R) | New Bedford, MA | S Atlantic | | 466 | | |
| Hecla : 1859-1863 | | 1859 | Knowles, Thomas & Co. | Nickerson, Eben (D) | New Bedford, MA | Pacific | | 1095 | 100 | 519 |
| Hecla : 1859-1863 | | 1859 | Knowles, Thomas & Co. | Luce, Barzillai (R) | New Bedford, MA | Pacific | | 1095 | 100 | 519 |
| Isabella : 1859-1863 | | 1859 | Knowles, Thomas & Co. | Tucker, Moses G. | New Bedford, MA | Baja, Pacific | | 26 | 2522 | 28000 |
| Wave : 1860-1862 | | 1860 | Knowles, Thomas & Co. | Courtney, Leonard | New Bedford, MA | | | 532 | | |
| Edward : 1860-1864 | | 1860 | Knowles, Thomas & Co. | Smalley, Orrick | New Bedford, MA | N Pacific, S Pacific | | 588 | 48 | |
| Mary and Susan : 1860-1864 | | 1860 | Knowles, Thomas & Co. | Howland, Philip | New Bedford, MA | Pacific | | 1869 | | |
| Minerva II : 1860-1864 | | 1860 | Knowles, Thomas & Co. | Penniman, Edward | New Bedford, MA | Pacific | | 1982 | | |
| Robert Morrison : 1861-1864 | | 1861 | Knowles, Thomas & Co. | Waite, Crary B. | New Bedford, MA | | | 1139 | | |
| John Wells : 1861-1865 | | 1861 | Knowles, Thomas & Co. | Fisher, Matthew (L) | New Bedford, MA | | | 570 | 120 | |
| John Wells : 1861-1865 | | 1861 | Knowles, Thomas & Co. | Sowle, John M. (R) | New Bedford, MA | | | 570 | 120 | |
| Wave : 1862-1864 | | 1862 | Knowles, Thomas & Co. | Fisher, Micajah C. | New Bedford, MA | | | 462 | | |
| Falcon : 1862-1865 | | 1862 | Knowles, Thomas & Co. | Flanders, Richard | New Bedford, MA | S Atlantic | | 197 | 722 | |
| Tamerlane : 1862-1865 | | 1862 | Knowles, Thomas & Co. | Gray, Nathaniel P. | New Bedford, MA | Pacific | | 83 | 1894 | 16070 |
| Isabella : 1863-1865 | B | 1863 | Knowles, Thomas & Co. | Winslow, Hudson | New Bedford, MA | N Pacific | | 160 | 480 | 7180 |
| Hecla : 1863-1867 | | 1863 | Knowles, Thomas & Co. | Luce, Barzillai | New Bedford, MA | Pacific | | 1112 | 11 | |
| Edward : 1864 | B | 1864 | Knowles, Thomas & Co. | Worth, Charles Perry | New Bedford, MA | | | 100 | | |
| Mary and Susan : 1864-1867 | | 1864 | Knowles, Thomas & Co. | Howland, Philip (D) | New Bedford, MA | Pacific | | 1767 | 94 | 600 |
| Mary and Susan : 1864-1867 | | 1864 | Knowles, Thomas & Co. | Herendeen, Alonzo O. (R) | New Bedford, MA | Pacific | | 1767 | 94 | 600 |
| Minerva II : 1864-1868 | | 1864 | Knowles, Thomas & Co. | Penniman, Edward | New Bedford, MA | North Pacific | | 226 | 3280 | 52000 |
| Wave : 1865-1866 | | 1865 | Knowles, Thomas & Co. | Handy, Elisha B. | New Bedford, MA | | | 580 | 3 | |
| Falcon : 1865-1867 | | 1865 | Knowles, Thomas & Co. | Dougherty, Francis | New Bedford, MA | S Atlantic, Indian | | 250 | 500 | 4000 |
| Robert Morrison : 1865-1868 | | 1865 | Knowles, Thomas & Co. | Worth, Charles Perry | New Bedford, MA | | | 757 | 378 | 940 |
| Tamerlane : 1865-1869 | | 1865 | Knowles, Thomas & Co. | Winslow, Joshua Baker | New Bedford, MA | Pacific | | 457 | 1538 | 13467 |
| Ellen Morrison : 1866-1870 | | 1866 | Knowles, Thomas & Co. | Luce, Presbury N. (L) | New Bedford, MA | Pacific | | 572 | | |
| Ellen Morrison : 1866-1870 | | 1866 | Knowles, Thomas & Co. | Andrews, Samuel H. (R) | New Bedford, MA | Pacific | | 572 | | |
| John Carver : 1866-1870 | | 1866 | Knowles, Thomas & Co. | Worth, Henry F. (L) | New Bedford, MA | | | 69 | 1535 | 22976 |
| Petrel : 1866-1870 | | 1866 | Knowles, Thomas & Co. | Worth, Francis S. | New Bedford, MA | Pacific | | 997 | 2 | |
| Hecla : 1867-1869 | | 1867 | Knowles, Thomas & Co. | Handy, Elisha B. | New Bedford, MA | S Atlantic | | 486 | 12 | |
| Wave : 1867-1869 | | 1867 | Knowles, Thomas & Co. | Cannon, Elisha, II (D) | New Bedford, MA | Atlantic, W Indies | | 710 | 8 | |
| Wave : 1867-1869 | | 1867 | Knowles, Thomas & Co. | Briggs, Barnabas Alvin (R) | New Bedford, MA | Atlantic, W Indies | | 710 | 8 | |
| Mary and Susan : 1867-1870 | | 1867 | Knowles, Thomas & Co. | Herendeen, Alonzo O. | New Bedford, MA | Pacific | | 1244 | | |
| Falcon : 1867-1871 | | 1867 | Knowles, Thomas & Co. | Allen, Charles Edward | New Bedford, MA | S Pacific | | 751 | 9 | |
| Minerva II : 1868-1871 | A | 1868 | Knowles, Thomas & Co. | Allen, Hezekiah (R) | New Bedford, MA | N Pacific | | 339 | 4212 | 12715 |
| Minerva II : 1868-1871 | A | 1868 | Knowles, Thomas & Co. | Hoxie, Henry M. (R) | New Bedford, MA | N Pacific | | 339 | 4212 | 12715 |
| Robert Morrison : 1868-1871 | | 1868 | Knowles, Thomas & Co. | Slocum, Henry A. (L) | New Bedford, MA | | | 443 | 131 | 1239 |
| Robert Morrison : 1868-1871 | | 1868 | Knowles, Thomas & Co. | Macomber, Leonard K. (R) | New Bedford, MA | | | 443 | 131 | 1239 |
| Hecla : 1869-1870 | L | 1869 | Knowles, Thomas & Co. | Smith, Frederick Howland | New Bedford, MA | Indian | | 564 | 8 | |
| Wave : 1869-1870 | | 1869 | Knowles, Thomas & Co. | Briggs, Barnabas Alvin | New Bedford, MA | Atlantic | | 348 | 524 | |
| Tamerlane : 1869-1873 | | 1869 | Knowles, Thomas & Co. | Fordham, Thomas Enos | New Bedford, MA | Pacific | | 754 | 568 | 3500 |
| John Carver : 1870-1874 | | 1870 | Knowles, Thomas & Co. | Howland, Humphrey D. | New Bedford, MA | N Atlantic, S Pacific | | 1518 | 4 | |
| Mary and Susan : 1870-1874 | | 1870 | Knowles, Thomas & Co. | Herendeen, Alonzo O. (L) | New Bedford, MA | Pacific | | 1696 | 6 | |
| Mary and Susan : 1870-1874 | | 1870 | Knowles, Thomas & Co. | Mate (RL) | New Bedford, MA | Pacific | | 1696 | 6 | |
| Mary and Susan : 1870-1874 | | 1870 | Knowles, Thomas & Co. | Herendeen, Alonzo O. (R) | New Bedford, MA | Pacific | | 1696 | 6 | |
| Wave : 1871-1873 | | 1871 | Knowles, Thomas & Co. | Briggs, Barnabas Alvin | New Bedford, MA | | | 752 | 7 | |
| Petrel : 1871-1874 | | 1871 | Knowles, Thomas & Co. | Smith, Frederick Howland (L) | New Bedford, MA | | | 1412 | 69 | 400 |
| Petrel : 1871-1874 | | 1871 | Knowles, Thomas & Co. | Unknown (RL) | New Bedford, MA | | | 1412 | 69 | 400 |
| Petrel : 1871-1874 | | 1871 | Knowles, Thomas & Co. | Smith, Frederick Howland (R) | New Bedford, MA | | | 1412 | 69 | 400 |
| Falcon : 1872-1875 | | 1872 | Knowles, Thomas & Co. | Allen, Hezekiah | New Bedford, MA | | | 1205 | 300 | |
| Tamerlane : 1873-1877 | | 1873 | Knowles, Thomas & Co. | Moulton, George W. J. | New Bedford, MA | New Zealand | | 1450 | 300 | 2000 |
| Wave : 1874-1876 | | 1874 | Knowles, Thomas & Co. | Briggs, Barnabas Alvin | New Bedford, MA | | | 750 | | |
| Mary and Susan : 1874-1877 | | 1874 | Knowles, Thomas & Co. | Handy, James T. | New Bedford, MA | Pacific | | 2000 | | |
| Petrel : 1874-1877 | | 1874 | Knowles, Thomas & Co. | Downes, Charles S. | New Bedford, MA | Indian O | | 1050 | 200 | 1629 |
| Falcon : 1875-1879 | | 1875 | Knowles, Thomas & Co. | Herendeen, Alonzo O. (L) | New Bedford, MA | Pacific | | 1400 | 175 | |
| Falcon : 1875-1879 | | 1875 | Knowles, Thomas & Co. | Handy, Pliny B. (RL) | New Bedford, MA | Pacific | | 1400 | 175 | |
| Falcon : 1875-1879 | | 1875 | Knowles, Thomas & Co. | Crowell, James A. (R) | New Bedford, MA | Pacific | | 1400 | 175 | |
| John Carver : 1875-1879 | | 1875 | Knowles, Thomas & Co. | Dean, Aaron (D) | New Bedford, MA | Pacific | | 972 | 65 | 375 |
| John Carver : 1875-1879 | | 1875 | Knowles, Thomas & Co. | Gault, Lysander (RL) | New Bedford, MA | Pacific | | 972 | 65 | 375 |
| John Carver : 1875-1879 | | 1875 | Knowles, Thomas & Co. | Coffin, John A. (RL) | New Bedford, MA | Pacific | | 972 | 65 | 375 |
| John Carver : 1875-1879 | | 1875 | Knowles, Thomas & Co. | Stanton, James Everett (R) | New Bedford, MA | Pacific | | 972 | 65 | 375 |
| Wave : 1876-1879 | | 1876 | Knowles, Thomas & Co. | Hammond, James Henry | New Bedford, MA | Atlantic | | 700 | | |
| Falcon : 1879-1882 | | 1879 | Knowles, Thomas & Co. | Handy, Pliny B. | New Bedford, MA | Atlantic | | 1200 | 640 | 3000 |