The ship with two salvage tugs is moving around, there’s no actual towage yet. Weather is fine, so it is not weather which hampers or delays towage, it is no doubt, fire and/or its’ dangerous consequences.
UPDATE: Two more tugs are to help with firefighting on YANTIAN EXPRESS: ATLANTIC ENTERPRISE (from NY or Halifax, not clear with this tug), UNION SOVEREIGN (IMO 9262742) sailed from Rotterdam.
Full chronology: http://maritimebulletin.net/2019/01/04/container-ship-yantian-express-on-fire-in-north-atlantic/
// Mikhail Voytenko
My name is Mikhail Voytenko, I’m Russian, professional merchant marine navigator, by education and former experience. I own and run Maritime Bulletin website for more than 10 years. I've been involved in solving a number of piracy hijack cases, including the hijack of ro-ro FAINA, loaded with tanks. It was me who made public, and unravel, freighter ARCTIC SEA mystery. I've been also closely involved in a number of maritime disaster, one of them being MSC FLAMINIA major fire.