The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Offshore Energy[3] reported Seaway Heavy Lifting took delivery of the new-build Oleg Strashnov crane vessel on 1 April 2011.
Corroborates the 2011 service entry and Royal IHC (formerly IHC Merwede) as builder.[1]
Trade press report dates delivery of the new-build Oleg Strashnov crane vessel to Seaway Heavy Lifting to 1 April 2011.[1]
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.