Intellivision Cartridge Instructions
(for 1 players)
TO SUB SQUADRON: Enemy convoys approaching...All have destroyer
escorts...Station subs at sea...Stalk your targets...Fire torpedoes...Evade
surface gunnery and depth charges...Sink all ships...Good hunting!
OBJECT OF THE GAME
You control 4 submarines, one at a time. Your targets: 6 convoys,
which are crossing the open sea. Navigate them, sight ships through
the periscope, then fire your ready torpedoes. Take evasive action to
escape hits from deck guns and depth charges. Sink the ships before
they can reach a safe harbor and form an almost-unstoppable
invasion force to attack your home base.
CHECK YOUR CONTROLS
Top Side Buttons: Fire Torpedoes
Bottom Side Buttons: Reverse Engines
Disc controls Runner
Left Side: Port
Right Side: Starboard
Keypad 1-5 set skill level & Engine Speed
1 = Skill *** / Stop Engines
2 = Skill ** / Engines 1/4
3 = Skill * / Engines 1/2
4 = Skill **** / Engines 3/4
5 = Skill ***** / Engines Full
Keypad 5 = Return Key
Keypad 6 = Dive
Keypad 7 = Surface
Keypad 8 = Sonar On/Off
Keypad Clear = Select Submarine
Keypad 0 = Stop At Sea All Subs
Keypad Enter = Stop At Sea Active Sub
Press RESET. You see the SUB HUNT Title Screen.
Set the game skill level:
Press * (3) for the Lieutenant's Game (easiest level)
Press ** (2) or the Disc for the Lt. Commander's Game
Press *** (1) for the Commander's Game
Press **** (4) for the Captain's Game
Press ***** (5) for the Admiral's Game (hardest level)
Note: for more info about skill levels, see below.
HOW TO PLAY SUB HUNT
Phase One: Deploy Submarines
When you select the skill level (see above), the ocean map appears.
At the top of the screen (north) is the Enemy Staging Harbor. To the
right (east) is your Home Base. Just to the left of your Base are your
4 Submarines. On the far left (west) of the screen is the Convoy
In a few seconds, the first of six enemy convoys appears at the west
edge of this Ocean Map, heading eastward. Press SELECT [CLEAR] to
activate a sub. Touch the left side of the Disc to start it moving
toward the convoy. Then send out your remaining subs. Press
SELECT [CLEAR] to turn a vessel dark, then deploy it toward the area
between the convoy and its staging harbor destination.
All subs stop when the first battle begins. SELECT sub nearest the
convoy. Guide it by touching the Disc edge (press top to go North,
bottom to head South, etc.) Intercept the gray ship figure as fast as
you can. When you contact the enemy, both ships start flashing, and
it is time to start...
PHASE TWO: General Quarters!
The screen now shows the situation on your "sonar map". You are
still east of the approaching convoy.
DEPTH GAUGE (marked "D"). In 20' Increments. At far left, fully
submerged. At far right, fully surfaced.
RUDDER (marked "R"). Shows rudder position relative to present
heading. At far left, hard to port. At far right, hard to starboard.
SPEED (marked "S"). Shows current sub speed. At far left, sub is in
reverse. At far right, full speed ahead.
TORPEDOES. Show current status. Green means armed, ready to fire.
Red means torpedo tub not yet loaded.
YOU MUST SELECT AN ENGINE SPEED TO START MOVING TOWARD
YOUR TARGETS. At long range, press FULL  to move at Full Speed.
When you close in, and during your attack on the convoy, you should
proceed at a slower speed. When you touch an engine room
Telegraph symbol [1 to 5 on the KEYPAD], you start to move at that
speed. To go into reverse, keep pressing either lower action button.
To resume forward speed, release the button.
NOTE: Surface speed is about 25% faster than submerged speed.
NOTE: Your rudder is more responsive at every higher speed. When
you are stopped, the rudder does not change sub's direction at all.
When you get near the convoy, your sub flashes more slowly. You
are now almost within visual sighting range. Submerge to periscope
level at this point, by pressing DIVE  ONE TIME. Every time you
press this key you dive 20 feet deeper. The sky color darkens
slightly when you go from the surface to periscope depth. Destroyers
can also detect your location at this range if your sonar is on. Turn
your sonar OFF  if you want to mount a sneak attack!
A destroyer always leads the formation. At the 3 highest Skill Levels,
each convoy includes two destroyers. If you're sighted, the escort
ship leaves the convoy and chases you, firing its deck guns if you are
surfaced, and dropping depth charges if you are submerged. The
Destroyer tends to stay behind you, and you cannot outrun it. Try to
torpedo the destroyer as it approaches you. If you miss, dive as deep
as you can, stop the engine and turn off the sonar (because either of
them give away your position). After a while, the destroyer may give
up the hunt and return to escort portion. Depth charge sounds get
fainter. When your sub starts flashing at a faster rate, press RETURN
 to circle around in front of the convoy. When you see the ocean
map again you can start another attack.
NOTE: You cannot use RETURN  to escape when you're in close-
range battle position. You must be far enough from the convoy so
your sub is flashing at the fast, long- range rate.
WHAT YOU CAN SEE
When you're near the convoy, you can see the ships through the
periscope. You also see their position on the sonar map, as dots that
are dimmer and smaller than your flashing sub figure. With some
practice, you can relate these sonar blips to the periscope images, so
you can maneuver to attack each sub in turn.
You see the ships either from the side or head-on, depending on the
approach direction. If a ship looms very large on the periscope, then
disappears, it means you passed it. Press either Lower Action Button
to go into Reverse. The target ship will probably reappear.
When either of the torpedo symbols is green, you can fire one
It takes a few seconds to reload the empty torpedo tube. During that
reload time, the torpedo indicator turns red. There is no limit to the
number of times torpedo tubes will be reloaded.
TO FIRE A TORPEDO, PRESS EITHER TOP ACTION BUTTON.
Your maximum range is about halfway to the horizon, seen through
The torpedo direction is set at the center notch of the periscope view
when you press a "Fire" button.
You MUST be on the surface or at periscope level to fire torpedoes.
If you sink 36 ships you win the game. The count of sinkings is
shown at the left of the periscope view. When you win, you get a
spirited victory salute -- you're a naval hero! You can also win by
sinking so many enemy ships that they cannot form an invasion
force to attack you.
The convoys' primary destination is the STAGING HARBOR. Although
you can't see them, 3 destroyers are waiting there. As soon as
enough surviving ships arrive, an invasion fleet forms, consisting of 3
destroyers and 3 troopships. If there are not enough convoy ships
arriving to make up this invasion force, they will just be held in the
harbor until enough survivors get past your subs. The invasion fleet
appears as a dark shape, then moves out of the staging harbor,
heading for your home base.
You MUST sink all ships in this fleet before they arrive at your home
It will be very hard to sink 3 destroyers, but this is your last chance
avoid defeat. If the invasion force reaches your home base, the land
changes color, and the game is over.
MORE ABOUT SKILL LEVELS
The skill level you select at the start of the game affects the play a
great deal. At higher skill levels (3, 4 and 5), the destroyer escorts
are much tougher in battle. There are two of them in every convoy.
Their deck guns and depth charges are more accurate, and they are
able to find you more often, even when you dive deep. Also, the
convoys appear more frequently and move faster!
If the destroyer spots you, it will leave the convoy to attack your sub
with its deck guns and depth charges. Don't try to fight the destroyer
on the surface! Dive to maximum depth by pressing DIVE 
repeatedly, until your depth gauge needle is all the way to the left
side. You hear the depth charges and see the picture jiggle from the
concussion. You can't outrun the destroyer, especially under water.
A good strategy is to shut off your engine AND your sonar. You'll be
motionless under the sea, and without the sonar blips that show you
where the surface vessels are -- but this will deprive the destroyer
of noise-making clues what will give your position away. If depth
charges persist, and seem to be very close, start up the engine at full
speed for a short
time, then stop again. Keep the sonar off until depth charges stop.
Wait a few seconds, then press SONAR to see where your enemy is
located. If you restart sonar and engines too soon, the destroyer will
come back and renew its attack, and you might have to dive and hide
When the convoy moves a long distance away from you, your sub
figure starts flashing faster. Press RETURN to go back to the big map.
Now you can start another attack. REMEMBER, YOU CAN'T USE THE
RETURN KEY WHILE YOU ARE WITHIN ATTACK RANGE!
SUMMARY OF CONTROLS AND WHEN THEY ARE USED
1 Preparation for Game -- Game Title on Screen
Select easiest Skill Level: Press * (KEYPAD 3)
Select Skill Level 2: Press ** (KEYPAD 2) or DISC
Select Skill Level 3: Press *** (KEYPAD 1)
Select Skill Level 4: Press **** (KEYPAD 4)
Select Skill Level 5: Press ***** (KEYPAD 5)
2 Deployment Phase -- Large Map on Screen
Select Active (dark) Sub: Press SELECT (KEYPAD CLEAR)
Steer Active Sub: Press DISC edge at desired direction
Stop All Moving Subs: Press STOP ALL (KEYPAD 0)
Stop Active Sub: Press STOP ONE (KEYPAD ENTER)
3 Battle Phase -- Sonar Map and Periscope on Screen
Stop Engine: Press STOP (KEYPAD 1)
Go ahead 1/4 Speed: Press 1/4 (KEYPAD 2)
Go ahead 1/2 Speed: Press 1/2 (KEYPAD 3)
Go ahead 3/4 Speed: Press 3/4 (KEYPAD 4)
Go Full Speed ahead: Press FULL (KEYPAD 5)
Reverse Engine: Keep Pressing either LOWER ACTION BUTTON
Steer Sub: Press DISC; Left side to Port; Right side Starboard
Submerge 20 Feet : Press DIVE (KEYPAD 7)
Rise 20 Feet: Press SURFACE (KEYPAD 8)
Turn Sonar ON or OFF: Press SONAR (KEYPAD 9)
Return to big map for new attack: Press RETURN (KEYPAD 6)
Fire Torpedo: Press either TOP ACTION BUTTON
�1981, 1998 Intellivision Productions, Inc.
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