White heavy tape about 2" wide (50mm) was wrapped aroundposts, sticks and trees bout 12" above the ground to mark all walkways, tracks and trenches, at and near the front lines. This was sothat troops could see their way around at night time. No lightswere permitted as this would attract enemy fire. In the photobelow the tape is show in the centre of the photo.

Bright coloured crosses were placed on the southern side of hillsso our aircraft could see that it was a friendly position, and notbomb or strafe us. The crosses and colours were changed fromtime to time so as the enemy could not use a similar method.While I was in Korea they were using bright iridescent red -orange or yellow. In the photo below you can see a cross afraction to the right of the centre.