And so you end up squawking 3000 and climbing to 4626 feet. And this doesn't involve the QNH then, which is usually also four digits. Do you have any trick of distinguising them?
Ah yes....The squawk comes at the end
Actually these clearances are normally in a set format, in my example ROUTE, ALT, FREQ, SQUAWK. But you are right, I'll put CM / DM in front for climb / Decend and maintain and NA for not above (VFR clearance), and Q infront of Alt if there is any ambiguity...