All Humber Keels traditionally towed a cog boat, which was used as a general tender, for carrying out lines or anchors and as a lifeboat should the keel have the misfortune to founder. Cog boats were always sculled with a large sweep over the stern, rather than being rowed with oars. This made them much easier to manouvre in the confined spaces of a dock. The cog boat is clinker built of larch planks with oak frames. A full size cog boat is 12 foot 6 inches long with a beam of 5 feet. They are very bluff in the bow with very flat floors and then a fine run aft to a wine glass stern. This makes them very stable vessels able to carry several people or a large anchor. It is possible to step off the stern of the keel onto the bow of the cog boat without it capsizing. Cog boats were raced at the annual watersports regattas held at locations in south Yorkshire such as Thorne.
Daybreak had a new cog boat built by Ken Ward-Foxton of Whitby in 2010. Ken carried out extensive research to make sure the cog boat was as authentic as possible. Cog boats were traditionally painted in the same colours as the keel and after delivery Daybreak’s cog boat was painted in her colours before being relaunched.
There are some old photographs of cog boats rigged with a sail. In 2013 Daybreak’s cog boat was rigged with a standing lugsail.