se prescribed. (33)

=83. Repeating orders, commands and signals; officers, platoon
leaders, guides and musicians equipped with whistles; whistles with
different tones.= Except in movements executed at =attention=,
commanders or leaders of subdivisions repeat orders, commands, or
signals whenever such repetition is deemed necessary to insure
=prompt= and correct execution.

Officers, battalion noncommissioned staff officers, platoon leaders,
guides, and musicians are equipped with whistles.

The Major and his staff will use a whistle of distinctive tone; the
captain and company musicians a second and distinctive whistle; the
platoon leaders and guides a third distinctive whistle. (34)

=84. Limitation of prescribed signals; special prearranged signals.=
Prescribed signals are limited to such as are essential as a
substitute for the voice under conditions which render the voice
inadequate.

Before or during an engagement special signals may be agreed upon to
facilitate the solution of such special difficulties as the particular
situation is likely to develop, but it must be remembered that
simplicity and certainty are indispensable qualities of a signal. (35)

Orders

=85. Orders defined; when employed.= In these regulations an =order=
embraces instructions or directions given orally or in writing in
terms suited to the particular occasion and not prescribed herein.

=Orders= are employed only when the =commands= prescribed herein do
not sufficiently indicate the will of the commander.

Orders are more fully described in paragraphs 378 to 383, inclusive.
(36)

Commands

=86. Command defined.= In these regulations a =command= is the will of
the commander expressed in the phraseology prescribed herein. (37)

=87. Kinds of commands; how given.= There are two kinds of commands:

The =preparatory= command, such as =forward=, indicates the movement
that is to be executed.

The command of =execution=, such as =MARCH=, =HALT=, or =ARMS=, causes
the execution.

=Preparatory= commands are distinguished by =italics=; those of
execution by =CAPITALS=.

Where it is not mentioned in the text who gives the commands
prescribed, they are to be given by the commander of the unit
concerned.

The =preparatory= command should be given at such an interval of time
before the command of =execution= as to admit of being properly
understood; the command of =execution= should be given at the instant
the movement is to c