Last Updated 5 days ago
Filmmaking Dictionary: Number 1 / 10-1 (Film Set Radio Code)
Definition
10-1, spoken ‘ten-one’, is commonly used on some North American film and television sets to indicate a brief washroom break. A crew member might say, ‘I’m going 10-1,’ to let the relevant person know they are temporarily stepping away.
It is informal production shorthand, not a universal radio standard. Some crews use different wording or simply say they are taking a washroom break. Follow the production’s established communication practice.
What the Call Communicates
The useful information is availability. Someone who is needed at a camera position, a lockup or another assigned task will be away briefly, and the department may need to arrange coverage.
The code does not need to announce personal details to the entire crew. Use the appropriate person or department channel and keep the message short. On a small set, a direct conversation can be clearer than a radio call.
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Using It on Set
- Identify yourself when the recipient may not recognise your voice.
- Tell the relevant department contact that you are stepping away.
- Arrange any necessary handoff for the task you are covering.
- Let that person know when you are available again.
- Use plain language if the code is unfamiliar or misunderstood.
A washroom call should not leave the crew guessing whether someone has left the location, changed channels or become unavailable for another reason. The point is a clear handoff, not demonstrating knowledge of slang.
Example
A production assistant covering a doorway tells the key PA that they need a 10-1. The key PA arranges another person to cover the position. When the assistant returns, they confirm that they are back and resume the assignment.
The same principle applies in another department: inform the appropriate colleague so a short absence does not become an unexplained gap in communication.
10-1 Versus 10-2
Where both codes are used, 10-2 usually refers to a longer washroom break. Their meaning and frequency vary between crews. Neither code establishes a precise duration, and no one needs to provide an unnecessary personal explanation over an open channel.
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Frequently Asked Questions
Does every film set use 10-1?
No. Local and production-specific conventions differ.
Is it the same as going off walkie?
No. Stepping away for a washroom break and becoming unreachable by radio are different things. State any communication change clearly.
Related Terms
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