You should stop - I have something important to communicate: became, You should stop your vessel instantly.

I am undergoing a speed trial, became: I have a diver down; keep well clear at slow speed

I am taking in or discharging explosives: became, I am taking in, or discharging, or carrying dangerous goods.

I am carrying mails; dragging my anchor

You should stop your vessel instantly became, I wish to communicate with you.

I have a pilot onboard.

Ship does not have disease aboard; it signifies "I request free pratique," which means I ask that the authorities in the port give me a clean bill of health.

Keep clear; Maneuvering with difficulty

I have a doctor on board: became My vessel is stopped and making no way through the water.

The way is off my ship - you may feel your way past me

In harbour the same. At sea, Your lights are out or burning badly: became, when used by fishing vessels to mean, 'My nets have come fast upon an obstruction'.

My engines are going full speed astern: became, My engines are going astern.

I require a tug. or, when made by fishing vessels operating in close proximity on the fishing grounds it means, 'I am shooting nets'.

I require medical assistance.

I require assistance (not distress).

Stop what you're doing and watch for my signals.

New additional meaning, made by fishing vessels operating in close proximity on the fishing grounds it means 'I

I am directing my course to port: became, I am altering my course to port

Disabled, communicate with me

I am going to send a message by semaphore: became, I am on fire and have dangerous cargo on board; keep well clear of me

Do not pass ahead of me became, Keep clear of me engaged in pair trawling.

You are standing into danger: became, You are running into danger.

No (Negative): became, No (Negative or 'The significance o the previous group should be

Man overboard

I am directing my course to starboard: became, I am altering my course to starboard.

Yes (Affirmative): became, Yes (Affirmative or 'The significance of the previous group should be read in the affirmative').