From:	GMPax@***.com GMPax@***.com
Subject:	magical effects for sea-going runners....
Date:	Tue, 16 Mar 1999 01:11:49 EST

In a message dated 3/15/99 9:40:03 PM Eastern Standard Time,
qwksilvr@*****.com writes:

> Ok. First question. What effect would a silence spell cast underwater have
> on sonar? Either passive or active.

The sonar device, if ACTIVE, would read a "hole" of infinite range (since the
ping would NEVER return from the area of the silence). For passive sonar,
likely it'd ba a good invisiability spell, though ofc you could not use your
OWN active sonar.

Like a "black hole" effect, IMO.

Example: a sonar using ship is in 50m of water, scanning the bottom on active
sonar. You are swimming 30m below the surface. Without the silence spell,
the sonar device gets a return from 30m down (20m off the bottom).

WITH the silence spell, it sees an infinite-depth HOLE in the bottm; part of
the sea floor seems to "fall away" to whatever distance is set as maximum for
the sonar system. i.e. 50m ... 50m ... 5,000km ... 50m ... 50 m ...

Sean
GM Pax