"Una balsa" is "a raft".
balsa
Vital Alsar has written: 'La Balsa' -- subject(s): La Balsa (Raft)
balsa tree trunks
Thor Heyerdahl's raft, named Kon-Tiki, was made from balsa wood logs lashed together with hemp rope. The raft was primarily constructed using traditional Peruvian techniques to replicate the ancient vessels that were believed to have been used by pre-Columbian South American civilizations.
The Spanish word that can be formed from those letters is "balsa", which means raft in English.
Thor Heyerdahl's raft the Kon Tiki was made from nine balsa wood tree trunks. The trunks were up to 45 feet long. It proved that a primitive raft could cross a large expanse of ocean.
Balsa wood is extremely light in weight, which is why it is used for the construction of model airplanes, but it's also a bit pricey, which would rule it out as raft material for most people. However, a Balsa wood raft would be very strong, and due to it's light weight, it would be extremely easy to carry overland when bypassing waterfalls or rapids too dangerous to run through. (This is called a "Portage" by we canoeists and Kyakers.) If ya have the money, go for it !
this ship is seaworthy.
Kon Tiki was a Norwegian raft that is made up of balsa wood and is extremely lightweight. It allowed for different expeditions into the Pacific in the 1900's.
and the answer is: nothing
Gregory. Seaworthy has written: 'Nag's Head, or, Two months among \\'