Large flow
Master Stream Deployment Drill
Deploy a portable monitor or deck gun, calculate safe flow, and confirm water supply before sustained operation. This is an original FireOps Calc drill organizer for NFPA 1410-style training and department-level practice.
Use local standards: Set staffing, time benchmark, PPE, water flow, hose load, and pass/fail criteria from your department SOP and official NFPA documents. This page does not reproduce the official NFPA standard.
Objective
Practice large-flow setup with the engineer focused on water supply, appliance/nozzle pressure, and safety.
Setup
- Deck gun or portable monitor prop
- Supply hose if portable monitor is used
- Nozzle/appliance information card
- Water source plan: tank, hydrant, relay, or static source
Evolution flow
Crew selects master stream device and intended flow.
Engineer identifies nozzle pressure and appliance/loss requirements.
Water supply capacity is checked before sustained flow.
Device is charged and flow is increased smoothly.
Crew confirms safe placement and stream reach.
Engineer records flow, PDP, intake, and water supply limits.
Engineer focus
- Confirm water supply before large flow
- Use correct master stream nozzle pressure
- Secure portable monitor before flow
- Avoid sudden pressure changes
- Watch intake pressure and residual supply
Common mistakes
- Flowing master stream from tank water without a time plan
- Not securing the monitor
- Using handline assumptions for master stream pressure
- Forgetting appliance/device loss
Evaluator sheet
Score and debrief
Use this as a printable quick score sheet. Add department-specific time targets and safety requirements before the drill.
Evaluation item
Result
Notes
Water established
Yes / Needs work
Line/device deployed safely
Yes / Needs work
Target pressure selected correctly
Yes / Needs work
Communication clear
Yes / Needs work
Kinks/hazards corrected
Yes / Needs work
Debrief completed
Yes / Needs work
After-action questions
- What was the first delay in the evolution?
- Was water available before the crew needed sustained flow?
- Was the pump pressure chosen from a known source or guessed?
- What did the engineer have to correct during the drill?
- What will the crew do differently on the next repetition?