Helm coaching with data: reduce WBV exposure without slowing the job
- Jason Purvey
- Apr 14
- 2 min read
Helm coaching is often treated as an art. In rough water operations it needs to become a controlled process, because the outcome affects injury risk, passenger comfort, and through-life costs.
The aim is not to criticise the helm. It is to reduce repeated high-severity events without compromising the task.
What “data-led coaching” changes
It removes ambiguity. Two skippers can run the same route and both say it was “fine”. Impact data shows whether it was fine.
A simple coaching loop that crews accept
1. Agree a route and operating window
Pick a regular run with repeatable conditions.
2. Define an event threshold
Agree what counts as “severe” for that vessel and task.
3. Review a small sample
Ten minutes per run. Identify the top five events.
4. Make one change
Speed band, heading selection, trim, or run timing.
5. Re-run and compare
Track reduction in severe events per hour.
Why this supports WBV controls
HSE and MCA guidance focus on controlling exposure. That means you need to show what you changed and what the effect was. Data gives you that record, and it gives your crews a fair way to improve.
System pairing
• Wave Guardian gives the helm immediate feedback and keeps impact awareness in view
• BRNKL adds time-synchronised replay when you want to align impacts with video and vessel data
If your coaching relies on memory and opinion, it will drift. If it relies on a simple metric, it improves.
Next steps
If you want a quick fit and use-case check, book a short demo and we will recommend the simplest system set that meets your duty-of-care and evidence needs.
• Contact / demo request: https://www.missiondynamics.co.uk/contact
Suggested internal links:
• Wave Guardian: https://www.missiondynamics.co.uk/wave-guardian
• Contact / demo: https://www.missiondynamics.co.uk/contact
Suggested external references:
• HSE WBV resources and calculator: https://www.hse.gov.uk/vibration/wbv/resources.htm
• MGN 436 Amendment 5 (MCA, GOV.UK): https://www.gov.uk/government/publications/mgn-436-mf-amendment-5-whole-body-vibration
