To facilitate night movements in the jungle, the
Japanese have made frequent use of phosphorescent
wood, vines, and ropes. The phosphorescent wood and
vines are plentiful in the jungles, while' individual
enemy soldiers usually carry a length of rope for a
variety of purposes. How the Japanese use such material
to aid their movements at night is explained in
the enemy instructions given below.
2. THE INSTRUCTIONS
a. Materials for marking should be prepared during the
daytime; however, luminous wooden markers will be prepared
the night before.
b. The various types of route-marking materials are luminous
wooden markers, vines, and ropes.
c. If luminous wooden markers are used, they should be
placed higher than a man's head; if vines and ropes are used,
they should be placed hip high.
d. Steep cliffs, holes, and other places of danger should be
blocked off with vines and ropes, and also marked by luminous
e. Luminous wooden markers should always be tied to a tree.
However, instead of being tied to a large tree, they can be
inserted between the thick vines, and so forth that surround
f. When the luminous wooden marker dries on account of
the sun, the degree of illumination will decrease; therefore, it
is necessary either to place it on moist ground during the
daytime or dip it in water in the evening.