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25. Two-Flag Signals.--Signals composed of 2 flags are urgent or important signals. They run from A B to XY.
26. Three-Flag Signals.-Signals composed of 3 flags are either compass, measurement, auxiliary phrases, or general vocabulary signals. Compass signals run from ABC to AS T, signals relating to money from ASU to AVT, and those relating to weight and measures from A l’K to BCN. Three-flag signals having the code flag uppermost relate to latitude, longitude, time, barometer, or to the thermometer.
27. Four-Flag Signals.-Signals composed of 4 flags are either geographical or alphabetical signals. All geographical signals begin with the letter A or B and run from ABCD to B FAU. Alphabetical signals all commence with the letter C.
28. Since each of the 26 letters of the alphabet is represented by a flag, it is evident that any word can be spelled by this system, and if the word to be spelled consists of more than 4 letters, two or more hoists must be used, as no hoist is to contain more than 4 flags. Explanations and instructions on this subject are to be found on pages 13 and 14 of the code book.
29. Illustrations.-In Fig. 7 are shown the principal forms of signals, where (1), (2), and (3) are urgent or important signals, (4) a compass signal, (5) a general vocabulary signal, and (6), (7), and (8) geographical signals. The interpretation of the respective signals is as follows:
= Have lost all my boats.
= Bad weather is expected.
Urgent or im
y = Have broken main shaft.
= Northeast by north.
I cannot make out the flags; General vocabhoist the signal in a better ulary sig. position.
= Falmouth (England).
= Philadelphia, Pa.
= San Francisco, Cal.
30. Signals should be hoisted where they can best be seen and not necessarily at the masthead, and each hoist should be kept flying until the other vessel has signified that the signal is understood. Care should be taken not to hoist a signal in an up-and-down position or with the uppermost flag down, which sometimes occurs when signals are sent up in a hurry.
31. Selected Sentences. —The following is a selection of sentences for the use of vessels meeting at sea. By committing these signals to memory, much delay in searching for them in the code book is obviated.
SI-Where are you from?
V ]-I wish to signal; will you come within easy signal distance?
VI-Repeat your signal.
important to communicate.
X N–Will you show me your Greenwich time?
my chronometer. IQH-I have no chronometer.
G Q--My chronometer has run down.
32. Signals of Distress.—When a vessel is in distress and requires assistance from other vessels or from the shore, the following shall be the signals to be used by her, either together or separately:
In the Daytime.-1. A gun or other explosive signal fired at intervals of about a minute.
2. The international code signal of distress indicated by NC.
3. The distant signal, consisting of a square flag, having either above or below it a ball or anything resembling a ball.