Sonar-Peilung

Short instructions
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Remake of Sonar-Peilung SABA Videoplay 12 
originally Sonar Search on System Fairchild #14.
Use joystick in port 2
Move aim and press fire.
Shorter sound means ships are closer.
You have 64 attempts to find all four ships.

Longer instructions
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You are stranded on the bottom of the ocean in a submarine, before 
going down you saw four ships that are now gathered right above you.
They're probably planning to attack a larger target in close vicinity. 
Navigational computer is down but you can run it enough at the time 
to send just 64 sonar pulses before it needs a recharge and you'll 
have to start over again - as the ships are likely to have 
moved. 
Try and locate all four ships so you can transfer the full coordinates.

Listen carefully for the sound pulses, short duration means you are close.
It can be difficult to distinguish ships that are close together.  

Ships are two, three, four and five length units, you have to cover 
the whole whole length of the ship to be 100% sure you have a proper 
location. Positive result will show as a reversed circle on screen.

Ships will flash in red and stay red when computer has sent all 
coordinates, if there are any characters A to D on screen it's just 
an estimate where the non found ships might be, it will give your 
friends a chance... so better to go another round. 

Use the second sonar control equipment, push button and listen carefully.
With enough power left they may be able to rescue you as well.

Good luck!
