No More 10-4 for Maryland State Police

Numerical codes dropped in favor of plain English

Friday, Feb 3, 2012  |  Updated 7:11 PM EDT
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There'll be no more 10-4 in Maryland State Police radio communications.

The agency abolished the numerical codes as of Feb. 1 in favor of plain English, officials said. The change is meant to reduce confusion, especially during incidents involving more than one police or emergency agency, police said.

So, now, instead of ending their shifts by announcing that they're 10-42, state troopers will presumably just say they're off duty. 

The Associated Public Safety Communications Officers list 100 different “10-codes,” including 10-89 for a bomb threat and 10-45 for an animal carcass.

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