| NAME ▲ | ▼ | VESSEL ▲ | ▼ | RIG | YEAR ▲ | ▼ | AGE | MORE |
|
| Isaac C. Howland | Octavia | Bark | 1841 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Octavia | Bark | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Master | | | |
|
| Isaac C. Howland | Petrel | Ship | 1853 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Petrel | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Greenhand | | | |
|
| Isaac C. Lee | Niger | Ship | 1844 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Niger | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Ordinary | | | |
|
| Isaac C. Lewis | Emma C. Jones | Ship | 1866 | 18 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Emma C. Jones | Ship | 18 | 5' 4" | Light | | | Hair | Eye | Residence | Rank | Remarks | | Dark | | Holmes Hole | Seaman | | | |
|
| Isaac C. Place | Sharon | Ship | 1841 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Sharon | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Boatsteerer | | | |
|
| Isaac C. Plummer | Fanny | Bark | 1864 | 18 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Fanny | Bark | 18 | 5' 7" | Light | | | Hair | Eye | Residence | Rank | Remarks | | Brown | | Wales, Me | | | | |
|
| Isaac C. Russell | President | Bark | 1876 | 22 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | President | Bark | 22 | 5' 9" | Dark | | | Hair | Eye | Residence | Rank | Remarks | | | | Wareham, Ma | | | | |
|
| Isaac C. Smith | Swift | Ship | 1841 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Swift | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Boatsteerer | ON AT MAUI SANDWICH ISLAND 11/02/1844 | | |
|
| Isaac C. Smith | Mary Frazier | Bark | 1842 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Mary Frazier | Bark | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | | ON AT PAITA PERU 09/09/1843 | | |
|
| Isaac C. Smith | Charles W. Morgan | Ship | 1841 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Charles W. Morgan | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Greenhand | DESERTED AT PAITA PERU 08/09/1843 | | |
|
| Isaac C. Turner | John Wells | Ship | 1850 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | John Wells | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Boatsteerer | | | |
|
| Isaac C. Weeks | India | Ship | 1858 | 24 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | India | Ship | 24 | | Dark | | | Hair | Eye | Residence | Rank | Remarks | | Dark | | Chilmark | | | | |
|
| Isaac C. Weeks | Leonidas | Bark | 1864 | 30 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Leonidas | Bark | 30 | 5' 8" | Light | | | Hair | Eye | Residence | Rank | Remarks | | Brown | | Chilmark | 2nd Mate | | | |
|
| Isaac C. Winters | Julius Caesar | Ship | 1847 | 18 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Julius Caesar | Ship | 18 | 5' 11" | Light | | | Hair | Eye | Residence | Rank | Remarks | | sandy | | New London | | | | |
|
| Isaac Capron | Brandt | Ship | 1853 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Brandt | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Seaman | | | |
|
