Deep Wading Carrier

[John McGillivray]

Here is a photo of another HLI carrier from the same book.

How dose the system of Carrier Tac signs works in an Infantry Bn? The first photo had the tac sign "W5" or “W6” this one appears to be “Z1”. I have seen others starting with the letter “T”. It seems that they all are contained in a diamond figure. Are these colour coded?

Thank you for your help.

Note the chore horse on the front right fender of this carrier. I guess that this one belong to the battalion HQ.