Maritime Security Levels (MARSEC)
| Captain of the Port Zone | MARSEC Level | Notes | Date Set |
|---|---|---|---|
| BOSTON |  |
Test | |
| CHARLESTON |  |
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| COLUMBIA RIVER | |
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| CORPUS CHRISTI | |
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| DELAWARE BAY | |
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| DETROIT | |
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| DULUTH | |
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| EASTERN GREAT LAKES | |
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| GUAM | |
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| HONOLULU | |
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| HOUMA | |
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| HOUSTON-GALVESTON | |
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| JACKSONVILLE | |
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| KEY WEST | |
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| LAKE MICHIGAN | |
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| LONG ISLAND SOUND | |
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| LOS ANGELES-LONG BEACH | |
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| LOWER MISSISSIPPI RIVER (MEMPHIS) | |
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| MARYLAND-NCR | |
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| MIAMI | |
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| MOBILE | |
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| NEW ORLEANS | |
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| NEW YORK | |
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| NORTH CAROLINA | |
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| NORTHERN GREAT LAKES | |
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| NORTHERN NEW ENGLAND (PORTLAND, MAINE) | |
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| OHIO VALLEY | |
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| PITTSBURGH | |
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| PORT ARTHUR AND LAKE CHARLES | |
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| PRINCE WILLIAM SOUND (VALDEZ) | |
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| SAN DIEGO | |
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| SAN FRANCISCO | |
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| SAN JUAN | |
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| SAVANNAH | |
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| SEAK - SOUTHEAST ALASKA (JUNEAU) | |
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| SEATTLE (PUGET SOUND) | |
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| SOUTHEASTERN NEW ENGLAND (PROVIDENCE) | |
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| ST. PETERSBURG | |
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| UPPER MISSISSIPPI RIVER (ST. LOUIS) | |
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| VIRGINIA | |
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| WESTERN ALASKA (ANCHORAGE) | |