n, or Beam
or Searchlight (Without Shutter).

GENERAL SERVICE CODE.

23. For the flag used with the General Service Code there are
three motions and one position. The position is with the flag
held vertically, the signalman facing directly toward the station
with which it is desired to communicate. The first motion (the
dot) is to the right of the sender, and will embrace an arc of
90 deg., starting with the vertical and returning to it, and will
be made in a plane at right angles to the line connecting the
two stations. The second motion (the dash) is a similar motion
to the left of the sender. The third motion (front) is downward
directly in front of the sender and instantly returned upward
to the first position. Front is used to indicate an interval.

24. The beam of the searchlight, though ordinarily used with
the shutter like the heliograph, may be used for long-distance
signaling, when no shutter is suitable or available, in a similar
manner to the flag or torch, the first position being a vertical
one. A movement of the beam 90 deg. to the right of the sender indicates
a dot, a similar movement to the left indicates a dash; the beam
is lowered vertically for front.

25. To use the torch or hand lantern, a foot light must be employed
as a point of reference to the motion. The lantern is most
conveniently swung out upward to the right of the footlight for
a dot, to the left for a dash, and raised vertically for front.

NOTE.--To call a station, make the call letter until acknowledged,
at intervals giving the call or signal of the calling station.
If the call letter of a station is unknown, wave flag until
acknowledged. In using the searchlight without shutter throw
the beam in a vertical position and move it through an arc of
180 deg. in a plane at right angles to the line connecting the two
stations until acknowledged. To acknowledge a call, signal
"Acknowledgment" followed by the call letter of the acknowledging
station.

Signaling with Heliograph, Flash Lantern, and Searchlight (With
Shutter).

GENERAL SERVICE CODE.

26. The first position is to turn a steady flash on the receiving
station. The signals are made by short and long flashes. Use a
short flash for dot and a long steady flash for dash. The elements
of a letter should be slightly longer than in sound signals.

27. To call a station, make its call letter until acknowledged.

28. If the call letter of a station be unknown, signal A until