50,000 Transfer Attempts Later: What We Learned About Intensity

A fleet-wide dataset of 50,000 CTV and walk-to-work transfer attempts across three years reveals patterns that any single weather window hides. This post walks through what the aggregate view teaches about crew intensity that incident logs never could.

A single CTV pair at a North Sea opco logs roughly 2,000 transfer attempts a year across a 200-day working season. Multiply across a mid-size fleet — eight CTV pairs, three seasons — and you pass 50,000 attempts in a dataset. Each attempt has a timestamp, a sea state, a success-or-failure verdict, a tech identity, a target turbine, and downstream intensity effects. None of that data has historically been analysed as a single corpus. The Strathclyde investigation of optimum CTV fleet simulation simulates thousands of transfers across a 20-year OWF life. Their follow-up on optimum CTV fleet selection models climate and failure rates. Both are simulation studies, not observational ones, and observational data at scale has not been treated the same way.