If you see a heavy police presence Tuesday morning near Port Miami, don’t worry: it’s only a test.

Miami-Dade Fire Rescue, along with Miami-Dade Police and port security, will be participating in a joint simulated mass casualty incident drill.

Intended to provide the closest possible simulation of an actual disaster, this drill will be recreating some of the scenarios that took place during a boiler explosion aboard a cruise ship back in 2003.

The drill is scheduled for 10 a.m.