The legal categorization of these lands conceals drastic differences in their physical reality, environmental status, and military utility. The following breakdown shows how federal agencies partition these territories across oceanic zones:
| Territory | Administrative Authority | Land Area vs. Strategic Function | Current Operational State |
|---|---|---|---|
| Midway Atoll | US Fish and Wildlife Service | 2.4 sq mi; Historic naval base turned marine refuge | Henderson Field kept open for emergency ETOPS diversions |
| Wake Island | US Air Force / Joint Military | 2.9 sq mi; Airbase and missile defense support | Fully operational military post; restricted access |
| Palmyra Atoll | FWS / The Nature Conservancy | 4.6 sq mi; Scientific research station | Rotational staff of 15, 25 marine biologists and conservationists |
| Johnston Atoll | FWS / Department of Defense | 1.0 sq mi; Decommissioned test site | Remediated cap; uninhabited, uncrewed ecological monitoring |
| Baker & Howland | US Fish and Wildlife Service | 1.4 sq mi (combined); Equatorial marine sanctuaries | Completely uninhabited; strictly regulated environmental research visits |
| Jarvis Island | US Fish and Wildlife Service | 1.7 sq mi; Pristine coral ecosystem | Uninhabited coral sanctuary; entry requires federal special-use permits |
| Kingman Reef | US Fish and Wildlife Service | 0.01 sq mi dry land; Semi-submerged reef system | Submerged marine sanctuary with apex predator density |
| Navassa Island | US Fish and Wildlife Service | 2.1 sq mi; Disputed Caribbean wildlife reserve | Uninhabited; claimed by Haiti under historic constitutional boundary |
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