Figure 3-2.--The Mk 58 Mod 1 marine location marker.
The Mk 6 signal consists of a wooden body with a
After the device has been removed from its
flat, die-cast metal plate fixed to its bottom end to
shipping container, the following rules apply:
protect it from water impact damage and to maintain it
1. Do not disturb the tape over the pull ring until
in the correct floating attitude. There are four flame and
immediately before you launch the device. This tape
smoke emission holes in the opposite end, each capped
not only prevents an accidental pull on the pull ring but
and sealed with tape. The pull-wire ring, also at the
also protects the igniter assembly from moisture, which
emission end, is also covered with tape.
might render the signal useless.
The Mk 6 signal has a direct-firing ignition system.
Ignition results from pulling the pull ring. The pull ring
is pulled by hand, and the device is thrown into the water
immediately. The pull wire ignites a 90-second delay
This signal is initiated by the physical
fuse that ignites the quick match at the top of the first of
movement of a friction wire through ignition
four candles. The quick match ignites the first candle
compound. Take extreme care to prevent
tension on the pull ring during all handling
starting mix, which, in turn, initiates burning of that
candle. Expanding gases of combustion force the cap
and tape from the emission hole, allowing smoke and
2. If you prepare this device for launching and do
flame to be emitted. When the first candle is nearly
not launch it, securely retape the pull ring into position
burned out, a transfer fuse carries the ignition to the
at the top of the signal without exerting any pulling
quick match of the next candle in series. This process
continues until all four candles have burned. A yellow
flame and gray-white smoke are produced for a
3. Under no circumstances should these signals be
minimum of 40 minutes.
stowed or restowed with their pull rings exposed or with