can we all just agree that the international code of signals for communication at sea via flag is fascinating?

so tonight i was having some serious quality time with the dictionary, and i have a rad illustrated dictionary, which often causes people to laugh at me (but i know it's just out of jealousy)...and i happened to stumble across the international code of signals in the entry for flags! here is a delightful picture, courtesy of the sheldrake yacht club*. each flag stands for a letter of the alphabet in addition to having a specific meaning. here it goes!

"A / diver down; keep clear
B / dangerous cargo
C / yes (affirmative)
D / am maneuvering with difficulty
E / altering course to starboard
F / disabled
G / want a pilot
H / pilot on board
I / altering my course to port
J / on fire; keep clear
K / desire to communicate
L / stop instantly
M / am stopped
N / no (negative)
O / man overboard
P / about to sail
Q / request pratique [which is, of course, 'clearance granted to a ship to proceed into port after compliance with health regulations or quarantine.' thanks trusty electronic dictionary friend!]
R / no meaning [i like this one. imagine the conversations that take place between young beginning sailors and crusty weathered sea captains. 'excuse me, captain, sir?' 'harumpf. what?' 'what does this flag mean?' 'ah, yes. that flag. it doesn't mean anything. except R.' {oh gosh it's so piratey i can hardly contain myself!}]
S / engines going astern
T / keep clear of me
U / you are running into danger
V / require assistance
W / require medical assistance
X / stop your intentions
Y / am dragging anchor
Z / require a tug"

i think that there is vast, untapped potential for these symbols to be used in everyday life.
like maybe posted on a person's bedroom or office door? (see especially J, K, P, T, V, W)
or perhaps in a bar? (see especially B, D, G, J, K, L, N, P, T, U, V, X, Z)
or as a t-shirt design? (see especially B, H, J, K, L, R, T, U, X)

*i don't have any sort of special relationship with the sheldrake yacht club. i just found their picture with a google images search, and i figured that since they've only had 13,223 visitors in the last ten years, it might be nice to link to them.