Sub Hunt for Intellivision

 SUB HUNT

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

Speed

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

GET READY...

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 Location.

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 [5] 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.

ATTACK STRATEGY 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 [7] 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 [9] 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 [6] 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 [6] 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.

TORPEDO ATTACK!

When either of the torpedo symbols is green, you can fire one torpedo.

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 periscope.

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.

GAME OUTCOME

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 base. It

will be very hard to sink 3 destroyers, but this is your last chance to avoid

defeat. If the invasion force reaches your home base, the land mass 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!

DEFENSIVE MANEUVERS

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 [7] 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 again.

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

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(c)1981, 1998 Intellivision Productions, Inc.