Pictures published by DR shows that SARMAT was likely towing the dredger 'ATLANT'. The images, which I have seen, show the dredger with approximately one meter of freeboard. This could be the reason for the slow and interrupted journey.
dr.dk
Russiske skibe udløste kommunalt kriseberedskab
I fem døgn var Læsø Kommune i forhøjet beredskab, mens russiske skibe cirkulerede rundt i et område med vigtige søkabler.