Alaska Maritime Survival and Vessel Stability Simulator

Live Metacentric & Swell Dynamics Beaufort Force: 7 (Gale)

Roll: +0.0°

GM: 0.38 m

Capsized (Hull Keel Up)

Quick Presets

Capsize Probability

89.4%

Transverse GM (Stability)

0.38 m

Max Thermal Survival

180 min

Search & Rescue Window

EXHAUSTED

ACTION: SEEK_ELEVATED_HULL_REFUGE

Vessel & Environmental Parameters

Sea State (Beaufort Force) 7

Topsail & Rigging Ice Accretion (Tons) 2.4 tons

Water Temperature (°C) 3.5 °C

Air Temperature (°C) -2.0 °C

Elevated Hull Exposure Height (m above water) 1.2 m

Incident Log & Drift Modeling

[06:31:00 UTC] Fishing vessel capsized in severe swells.

[06:31:05 UTC] Two crew submerged in frigid 3.5°C ocean; thermal window critical.

[06:31:12 UTC] 15yo survivor mounted overturned keel at 1.2m elevation.

Ice Accretion and Metacentric Stability Dynamics

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Read the explanation

In frigid waters, sea spray freezes to vessel rigging, adding topside weight that elevates the ship's center of gravity and sharply reduces transverse metacentric height. The model subtracts zero point two three seven five meters of metacentric height per ton of ice, dropping GM from zero point nine five down to critical thresholds. When Beaufort Force swells combine with degraded GM, capsize probability climbs to eighty-nine percent, triggering inverted hull refuge protocols to sustain survival.