Floating logs tied together are commonly referred to as a "log raft." This method is often used in logging and transportation to move large quantities of timber on water. Log rafts can be constructed using various types of logs and are typically secured with ropes or chains to ensure stability while floating.
That's called a 'raft'.
Raft?
raft
A raft, made of logs tied together.
A raft.
Xerxes used and bridge called the "Pontoon" bridge which is a colum of boats tied together side by side to get across the Hellespont (Dardanelles).
There is a hunting weapon consisting of three balls tied together - called a Bolas.
some cromangon who tied two logs together with vines, i.e. it's pre-history.
A raft
The word you're looking for is "bark". Bark refers to a type of vessel made from logs that are tied together, typically used for transportation. Historically, such vessels were commonly used by various cultures for navigating rivers and lakes.
A raft of logs tied together. Also (weird this one) an argumentative woman. Nowadays, a twin-hulled sailing boat that is too fast to compete in the 2012 Olympic Games The word"kattumaram" in the south Indian language of Tamil literally means wooden logs tied together which was and still is being used by the fishing community to go to the seas.The word catamaran is actually the mis spelt word of kattumaram.
Astronuts have to be tied to their beds at night to stop them from floating!