Z

Letter Z (Zulu)
International Code of Signals
I require a tug. When made by fishing vessels operating in close proximity on the fishing grounds it means:

usage:	international flag (signal), signal flag (nautical signal)
continent:	World
shape:	rectangular
colors:	(only colors)yellow, black, red, blue, (only colors)
devices:	TRIANGULAR FIELD number: 1 color: blackTRIANGULAR FIELD number: 1 color: yellowTRIANGULAR FIELD number: 1 color: blueTRIANGULAR FIELD number: 1 color: red
division:	gyronny/per saltire: number of areas: 4 areas, additional area: no additional area, division lines: straight,
charges:	charge(s): none, partition(s): none