Salvo!

Salvo! is a battery-operated game for two players where the goal is to sink your opponent's ships. After each player has set up their ships on the board, players take turns to fire at their opponent. With the aid of a plastic rangefinder disc, players set the angle and range of their shot by turning two knobs. This moves a lightbulb hidden beneath the board and when the 'fire' button is pressed, the bulb lights up if the shot is successful.

From the box:
"Salvo! A Powerful Game of Sea Warfare." - "A Brilliant New Idea. You Fix the Angle,Range and Fire! Can You Destroy the Enemy Fleet?"