Despite claims that most containerships operate on fixed-day weekly schedules, over 40% of vessels operated in liner services arrive one or more days late, according to a ground-breaking global survey from Drewry Container Shipper Insight. Drewry Shipping Consultants carried out what it believes is the liner shipping industry’s largest schedule reliability survey, based on the tracking of 3,300 vessel arrivals on 23 different east/west and north/south trade routes. The continuous survey is an attempt to help shippers plan their supply chains with realistic expectations of delivery times and assist them in the selection of liner carriers.