| Paygrade | Title | Insignia | ||
| dress uniform | collar device | |||
| shoulder boards | sleeves | |||
| O-1 | Ensign |  |
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| O-2 | Lieutenant Junior Grade |  |
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| O-3 | Lieutenant |  |
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| O-4 | Lieutenant Commander |  |
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| O-5 | Commander |  |
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| O-6 | Captain |  |
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| O-7 | Rear Admiral (lower half) |  |
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| O-8 | Rear Admiral (upper half) |  |
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| O-9 | Vice Admiral |  |
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| O-10 | Admiral |  |
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| Special | Fleet Admiral wartime rank only |
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