r a certain number of times, as agreed upon.
Such signals may be used only by guards that occupy exposed points.

They are used before the countersign is given, and must not be
communicated to anyone not entitled to know the countersign. Their use
is intended to prevent the surprise of a sentinel.

In the daytime signals such as raising a cap or a handkerchief in a
prearranged manner may be used by sentinels to communicate with the
guard or with each other. (217)

Guard Patrols

=1778.= A guard patrol consists of one or more men detailed for the
performance of some special service connected with guard duty. (218)

=1779.= If the patrol be required to go beyond the chain of sentinels,
the officer or noncommissioned officer in charge will be furnished
with the countersign, and the outposts and sentinels warned. (219)

=1780.= If challenged by a sentinel, the patrol is halted by its
commander, and the noncommissioned officer accompanying it advances
alone and gives the countersign. (220)

Watchmen

=1781.= Enlisted men may be detailed as watchmen or as overseers over
prisoners, and as such will receive their orders and perform their
duties as the commanding officer may direct. (221)

Compliments From Guards

=1782.= The compliment from a guard consists in the guard turning out
and presenting arms. (See Par. 1612.) No compliments will be paid
between retreat and reveille except as provided in paragraphs 361 and
362, nor will any person other than those named in paragraph 224
receive the compliment. (222)

=1783.= Though a guard does not turn out between retreat and reveille
as a matter of compliment, it may be turned out for inspection at any
time by a person entitled to inspect it. (223)

=1784.= Between reveille and retreat the following persons are
entitled to the compliment: The President, sovereign or chief
magistrate of a foreign country, and members of a royal family;
Vice-President; President and President pro tempore of the Senate;
American and foreign ambassadors; members of the Cabinet; Chief
Justice; Speaker of the House of Representatives; committees of
Congress officially visiting a military post; governors within their
respective States and Territories; governors general[20]; Assistant
Secretary of War officially visiting a military post; all general
officers of the Army; general officers of foreign services visiting a
post; naval, marine, volunteer, and militia officers in the service of