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Field calculators

Physics and clinical arithmetic for the jump bag, the chamber, the river and the shoring crew. Every result can be logged to the incident's ICS-214 with one tap; a low O2 / blood / lumber margin can raise a resupply escalation on the IC's map. Planning aids only — the medical director's protocols, the dive supervisor's tables and the structures specialist govern.

Incident Elevation m

Doctors & medics

O2 cylinder duration (elevation-corrected)

Burn resuscitation — USAISR Rule of Ten + Parkland

Walking blood bank — calcium for citrate

Dive, hyperbaric & swiftwater

Altitude dive — theoretical ocean depth & stops

USN Treatment Table 6 — where are we

Swiftwater hydrodynamic force

Rope, highline & US&R shoring

V-rig anchor angle

Highline track tension & safety factor

FEMA US&R vertical shore capacity

Expedition, study abroad & aquatics

WMS acclimatisation itinerary audit

Lake Louise AMS score

Wind chill & frostbite clock

WBGT heat stress — work / rest & hydration

Missing swimmer — drift datum & search grid

Log a decision to the ICS-214

Requesting a helicopter is never wrong. Declining a flight is never punitive. Ground versus air from your own numbers lives on the console's air request ledger; the arithmetic shows both doors, it does not choose.

Constants: cylinder factors D 0.16 · E 0.28 · M 1.56 · H/K 3.14 L/psi; Rule of Ten (adults ≥ 40 kg) %TBSA × 10 mL/h + 100 mL/h per 10 kg over 80; Parkland 4 mL × kg × %TBSA; barometric model ATA = (1 − 2.25577×10⁻⁵·h)^5.25588; swiftwater F = ½ρv²C_dA; V-rig T = W / 2cos(θ/2); highline T = WL / 4s; FEMA US&R field guide shoring loads; WMS 2019 altitude guidance (≤ 500 m/day sleeping gain above 3000 m, rest day every 3–4 days); Lake Louise 2018; NWS wind chill; WBGT = 0.7 T_w + 0.2 T_g + 0.1 T_a (Stull wet-bulb); drift = current + 3 % wind leeway, radius 25 m + 18 % of drift. Not medical, engineering or legal advice.