SMCP basics: Standard Marine Communication Phrases explained simply
A bulk carrier with a crew from four countries, a VTS operator ashore, a pilot on the ladder: everyone has to understand everyone, first time, in bad weather, over a noisy radio. That is exactly the problem the Standard Marine Communication Phrases were created to solve. Here is what SMCP is and the parts you will actually be tested on.
What SMCP is
The Standard Marine Communication Phrases are a collection of fixed English phrases for the most common situations at sea: navigation, radio traffic, port operations, safety and emergencies. The IMO adopted them in 2001, and STCW expects officers of the navigational watch to use and understand them. The idea is simple: when the phrase is standard, nobody has to guess what the other person meant.
The eight message markers
SMCP messages often start with a marker, one word that tells the listener what kind of message follows:
| Marker | It means | Example |
|---|---|---|
| Instruction | Do this (you must) | Instruction. Pass astern of me. |
| Advice | I recommend this | Advice. Stand by on channel one six. |
| Warning | Danger ahead | Warning. Obstruction in the fairway. |
| Information | Facts, no action required yet | Information. My ETA at the pilot station is one four three zero. |
| Question | I am asking | Question. What is your draft? |
| Answer | Reply to a question | Answer. My draft is seven decimal five metres. |
| Request | Please arrange or provide | Request. I require two tugs. |
| Intention | This is what I will do | Intention. I will reduce speed. |
Mayday, Pan-Pan, Securite
- Mayday: distress. Grave and imminent danger to life or to the vessel. Priority over everything else on the air.
- Pan-Pan: urgency. A serious situation, but no immediate danger to life. Engine failure drifting near traffic, a seriously ill crew member.
- Securite: safety. Navigational and weather warnings, for example a floating container or a gale warning.
Each word is spoken three times at the start of the call. Recruitment tests love this trio, and so do examiners at interviews.
Standard replies you must know
| Phrase | Meaning |
|---|---|
| Say again. | Repeat your message. |
| Message not understood. | I received it, but I do not understand it. |
| Stand by. | Be ready and wait. |
| How do you read me? | How is my signal? (Answer: I read you five = loud and clear.) |
| Please speak slowly. | Reduce your speaking speed. |
| Correction. | I made a mistake; the correct version follows. |
| Over. | My transmission is finished, I expect your reply. |
| Out. | End of the exchange, no reply expected. |
Numbers and spelling
Numbers are spoken digit by digit: course 045 is "zero four five", 25 metres is "two five metres". The decimal point is the word "decimal": 13.5 knots is "one three decimal five knots". Names and call signs are spelled with the phonetic alphabet:
| Phonetic alphabet | |||
|---|---|---|---|
| A Alfa | H Hotel | O Oscar | V Victor |
| B Bravo | I India | P Papa | W Whiskey |
| C Charlie | J Juliett | Q Quebec | X X-ray |
| D Delta | K Kilo | R Romeo | Y Yankee |
| E Echo | L Lima | S Sierra | Z Zulu |
| F Foxtrot | M Mike | T Tango | |
| G Golf | N November | U Uniform | |
How tests check SMCP
Written recruitment tests usually check SMCP through multiple-choice questions: what a phrase means, which reply is correct, how to read a time or a course. Oral exams and interviews go further and expect you to produce the phrases yourself. The fastest way to get comfortable is little and often: read the phrases aloud, and drill a few questions every day.
Both free tools on this site include SMCP material: the Daily 5 serves fresh questions every day, and the free English check shows where you stand overall.
And when you are ready to train your ear, open the SMCP trainer: all 435 speakable phrases from the resolution, each with a recording in the accents you actually hear at sea (British, Filipino, Indian, Ukrainian, Polish). Hide the text and check yourself by ear, the way the listening section of a real test will.
Frequently asked questions
- What does SMCP stand for?
- Standard Marine Communication Phrases: the IMO's standardised English phrases for communication at sea, adopted in 2001.
- Is SMCP mandatory?
- STCW expects watchkeeping officers to use and understand it, and tests, VTS stations and pilots assume you do.
- Mayday vs Pan-Pan?
- Mayday = distress, immediate danger to life or vessel. Pan-Pan = urgency, serious but not immediately life-threatening. Securite = safety messages.
- How can I practise?
- Markers, standard replies, phonetic alphabet, numbers digit by digit, short exchanges aloud. The Daily 5 and the free check include SMCP questions.
This guide summarises the SMCP for training purposes and is not a substitute for the official IMO publication. SeamanEnglish is an independent training site, not affiliated with any test provider.