There’s a walkie channel for each department but ever wonder why that particular channel?
The International Alliance of Stage Employees, IATSE, have local unions within certain cities. Walkie channels are typically dedicated to a number that’s similar to the Local unions number.
1 - Production
2 - Open Line
3 - Teamsters
4 - Open Line
5 - Grip
IATSE Local 80: Motion Picture Studio Grips/Crafts Services
*since this number is trumped by art it’s likely it could be different
6 - Camera
IATSE Local 600: International Cinematographer Guild
7 - Lighting
IATSE Local 728: Motion Picture Studio Electrical Lighting Technicians
8 - Art
IATSE Local 800: Art Directors Guild