96 lines
3.6 KiB
Perl
96 lines
3.6 KiB
Perl
.TH Command SONAR
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.NA sonar "Use sonar to look for ships"
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.LV Basic
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.SY "sonar <SHIP/FLEET> <brief?>"
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The sonar command allows ships to look for submarines
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and submarines to look for ships.
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.s1
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If the <brief?> argument is
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specified then the sonar map will not be drawn. This is useful if you
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just need to see the list of ships you can detect. Whether or not a
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map is printed, the sonar information will be added to your bmap.
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.s1
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Only ships at sea may use sonar and sonar only detects ships
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which are at sea. Furthermore, there must be a straight line of water
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between the detector and the detected (sonar doesn't work around corners).
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.s1
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In the current implementation, sonar works similar to
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lookout. The major difference is that a submarines cannot use
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lookout to sight ships. Likewise, submarines cannot be sighted
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by ships via lookout.
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.s1
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There are two aspects to sonar - passive and active sonar.
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.s1
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ACTIVE SONAR
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.s1
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This is the most visible form of sonar. It is simply a
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ship's ability to use sonar pings to detect other ships.
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The range of a ship's active sonar is identical to the
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range that it can sight ships via lookout.
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(see \*Qinfo lookout\*U)
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When you type "sonar 25", you are using active sonar.
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.s1
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PASSIVE SONAR
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.s1
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This is more subtle. Passive sonar is a ship's ability
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to hear sounds, mainly active sonar pings. When a ship
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pings you with active sonar, you can detect that ping.
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If a ship with sonar gets pinged, that country receives
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a telegram saying "Sonar ping from x,y detected by ship Z!"
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In its current implementation, passive sonar is the ability
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to detect a ping.
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.s1
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When a ship emits a ping, that ping has to travel out to a
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target ship, reflect off of it, and then return to its source.
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So, in order to detect a ship X sectors away, a sonar ping
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must be able to travel 2X sectors - from the source to the
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target, and back to the source. So, if a ship can use active
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sonar to detect ships X sectors away, passive sonar can detect
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active sonars from 2X sectors away. So the range at which you
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can detect sonar pings is twice the range at which you can use
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sonar.
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.s1
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The active and passive sonar modes means that you want to be
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careful when you use sonar, because you will tell others where
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you are long before you actually detect them. This also gives
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you some warning before you get your submarine attacked, as
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enemy ships have to use sonar to find you. The key to submarine
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warfare is "run silent", meaning use your sonar only when you
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have to.
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.s1
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On the other hand, destroyers are designed to hunt subs. A
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destroyer guarding a player's coast should use sonar often,
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especially if it has other destroyers nearby to support him if
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he gets in trouble.
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.s1
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For example:
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.EX sonar 3
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.NF
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sb2 submarine 2 (#3) at 24,0 efficiency 76%, max range 2
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Sonar detects TheBorg (#5) bb4 battleship 4 (#1) @ 23,-1
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.
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. B ?
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\&. . 0 ?
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. . .
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. . .
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.FI
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.s1
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Sonar-capable ships of tech 310 or better can also detect mines with
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their sonar, although at only half their normal sonar range. Mines
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will show up on the sonar map as 'X' and this 'X' will be added to
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your bmap.
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.s1
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In the case of using sonar to detect subs, detection = (sub visibility + ship
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spy value). If detection is less than 8, then the sonar will just
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print you something like:
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.NF
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Sonar detects sub #12
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.FI
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If detection is above 7, then you will be told the ship type, and if
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it is above 9, you will also be told the owner of the sub. Note that
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type and owner will always be shown for Friendly subs.
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.s1
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Planes with the ASW ability can use
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sonar while on recon missions. See info recon for more details.
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.s1
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.SA "coastwatch, Ship-types, Sector-types, radar, recon, Ships, Detection"
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