K3 safety sim

See the accident
before it happens.

A new worker walks a 3D container terminal and makes the calls a first shift demands. Get one wrong and the sim replays what would have happened, then shows the rule.

Start shift → Read the docs
01 · WALK THE YARD

First person, from the gate

WASD and mouse. A beacon marks the next checkpoint. Trucks loop, the RTG sways, gulls circle the quay.

02 · MAKE THE CALL

A tractor is coming

Three options fill the screen. One is right, two are what people do when they are late. Press A, B or C.

03 · WATCH THE REPLAY

Wrong call, third person

The camera cuts away and plays the accident in slow motion, with the physics in the captions.

04 · DO THE SAFE THING

Then the rule

Hold E to put on PPE or clip a harness. Hit SPACE the moment the driver waves. Then the shift report.

Start shift →
Scroll
Permenaker 8/2010Personal protective equipmentUU 1/1970Occupational safety actPermenaker 8/2020Lifting and transport equipmentPermenaker 9/2016Work at heightPP 50/2012Safety management system (SMK3) Permenaker 8/2010Personal protective equipmentUU 1/1970Occupational safety actPermenaker 8/2020Lifting and transport equipmentPermenaker 9/2016Work at heightPP 50/2012Safety management system (SMK3)
How it works

Walk. Decide. Watch. Learn.

step 01

Walk the yard

WASD and mouse, first person. A beacon marks the next checkpoint. Trucks loop, the RTG sways, gulls circle the quay.

step 02

Make the call

Three options fill the screen. One is right, two are what people actually do when they are late. Press A, B or C.

step 03

Watch the replay

Wrong call: the camera cuts to third person and plays the accident in slow motion, with the physics in the captions.

step 04

Do the safe thing

Hold E to put on PPE or clip a harness. Hit SPACE the moment the driver waves. Then the shift report.

The kernel

The replay is the lesson.

A quiz tells you that you were wrong. A replay shows you the 25-tonne tractor, the 20 metres it needs to stop, and the three seconds you had. The regulation comes after the body, because that is the order in which it was written.

replay · truck lane · 00:03
Consequence replay: a terminal tractor strikes a worker at the crossing
ppe
A twist-lock falls on a helmetless worker
load
A suspended container drops
height
A worker steps off a container roof
snapback
A mooring line parts
Three shifts

Pick a job. Each one has different ways to go wrong.

on foot · 5 checkpoints
Yard checker

Gate PPE, the truck lane, the suspended load, the two-high stack, and whether you file the near-miss report.

Decision screen
start shift →
heavy equipment · 3 checkpoints
Reach stacker operator

Pre-start inspection on a warm machine, a checker in your blind spot, gusts at 14 m/s with a stack to build.

The yard
start shift →
quay & vessel · 3 checkpoints
Lashing crew

A gangway with no net, a stern line under 60 tonnes, and the fastest way to the top tier.

The quay
start shift →
Why not VR

Headsets train the people who already have a training room.

vr vs shiftreplay
VR safety trainingShiftReplay
HardwareHeadset per seat, PC, vendorAny laptop with a browser
Time to first lessonProcurement, install, onboardingOpen a link, click a role
Who sees itStaff at HQ with the roomThe contractor on day one
Adding a scenarioVendor projectOne JSON object
PresenceHigherLower. The replay makes up the difference

Molca, Immerse, SimLab and others do serious VR work for ports and energy. ShiftReplay is the version for everyone who does not get a headset.

Built for Devpost Learn

Planned first, then built.

devpost/
├── scope.mdThe kernel, who it is for, what was cut ├── prd.mdCore journey, screens, behaviour, decisions ├── spec.mdStack, components, data, failure modes └── checklist.mdBuild slices, verification, revisions