hull down

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hull down

adj
1. (Nautical Terms) (of a ship) having its hull concealed by the horizon
2. (Military) (of a tank) having only its turret visible
References in classic literature ?
We'll be "down, hull-down, on the old trail" from now on.
It was standing in a textbook hull-down position within the banks of a pond and overlooking the plains of the River Tawi and the village of Chhamb just three kilometers away.
Both tanks were fitted with visual and thermal Combat Identification Panels (CIPs) in working order, but the second tank crew could not obtain a clear visual view due to the hull-down position of the tank, according to the article "Blue-on-blue Ground Incidents during OIF," which appeared in Issue 2-2004 of Defense Update, International Online Defense Magazine.
What's more, an aerial target acquisition platform combined with other platforms capable of launching top-attack weapons counters the tactical advantage a defender enjoys from a hull-down or reverse-slope position.