You are the commander of a new Supergun and your mission
is to sink as many ships of the enemy fleet which is sailing through
a narrow shipping lane. The animation uses real images of aircraft carriers, battleships, destroyers, submarines and other ships for added realism.

The Supergun can reach any of the ships which pass by. You
control the range and direction and firing of the gun.
The Fleet is well protected with missile carrying ships.
You must defend the Supergun using the Anti-Missile Guns
when you are under attack or you will be wiped out.

There is a Fleet Data Sheet which prioritises the target ships and you
score more for high priority ships.
There are also submarines which appear randomly and these carry a high score if sunk. They are highlighted by a “Sub Alert” warning.

To enable high scoring those ships which are sunk will re-appear later
but those ships which you do not sink and pass by are gone.

Highest scores are recorded on the Hot Shot Scores screen with the name
of the player.

All the controls are placed along the bottom of the screen to allow ease of
access and manipulation. You need to control the Supergun direction and range from here as well as defending the Supergun with the Anti-Missile Guns.