With an operational depth of 1500ft, the Aviator is the first of its kind positively-buoyant submersible.

Mr. Dimon will plumb the operational depths of the new entity as president and take over as chief executive two years later.

The third zone, beyond the operational depth was known as the strategic depth.

But by occupying the German operational depth and preventing their retreat the German Army forces were isolated.

Soviet rifle forces penetrated German tactical defenses and pursued into the operational depths on foot at slow speed.

Successive defence belts would slow German forces down and force them to conduct slow and attritional battles to break through into the operational depths.

Most submarines are easily crushed by pressure if they go too deep, so the long cables extend the Navy's operational depth into the abyss.

The area is dredged to an operational depth of thirty-two feet.

Water pressure will hold the air until we reach operational depth.

Mack acknowledged the pilot's request, and then ordered Cheyenne to return to operational depth and proceed toward the reported datum.