The source of this heaviness is uncertain; possibly the Allied ships were bulkier in construction, or that the ships were waterlogged since they had not been dried out in the winter (though there is no real evidence for either suggestion).
Måske var de allierede skibe bygget tungere, eller måske var træet tungere fordi skibene ikke var blevet tørret ud om vinteren (der er ikke rigtig beviser for nogen af delene).