How far Tirpitz lay from the open sea

How far from the ocean was Tirpitz when she was sunk in a Norwegian fjord?

Approximately fifteen miles in a straight line, or about twenty-five miles along the route a ship could actually follow.

The estimated distance from the ship's anchorage near Tromso to open water is roughly fifteen miles as the crow flies. Following the actual navigable passage produces a longer figure of about twenty-five miles. The distinction illustrates how fjord geography complicates simple map-distance answers. A battleship's route through confined Norwegian waters mattered more than a straight-line measurement.