| Abbreviation | Definition |
|---|---|
| ISCS | Intelligence Specialist Senior Chief Petty Officer |
| ISCS | telligence Specialist Senior Chief Petty Officer |
| ISSA | Intelligence Specialist Seaman Apprentice |
| ISSA | telligence Specialist Seaman Apprentice |
| ISSN | Intelligence Specialist Seaman |
| ISSN | telligence Specialist Seaman |
| ISSR | Intelligence Specialist Seaman Recruit |
| ISSR | telligence Specialist Seaman Recruit |
| IT1 | formation Technician Petty Officer 1st Class |
| IT1 | Information Technician Petty Officer 1st Class |
| IT2 | formation Technician Petty Officer 2nd Class |
| IT2 | Information Technician Petty Officer 2nd Class |
| IT3 | formation Technician Petty Officer 3rd Class |
| IT3 | Information Technician Petty Officer 3rd Class |
| ITC | formation Technician Chief Petty Officer |
| ITC | Information Technician Chief Petty Officer |
| ITCM | formation Technician Master Chief Petty Officer |
| ITCM | Information Technician Master Chief Petty Officer |
| ITCS | formation Technician Senior Chief Petty Officer |
| ITCS | Information Technician Senior Chief Petty Officer |