seaworthiness       
noun [ U ] uk/ˈsiːˌwɜː.ði.nəs/ us/ˈsiːˌwɝː.ði.nəs/
 适航性
the fact that a ship is in a good enough condition to travel safely on the sea
  The bill sets tougher construction standards for fishing boats to improve seaworthiness.  该法案为渔船制定了更严格的建造标准,以提高适航性。 
 See: seaworthy
 - More examples
- The panel has been exploring the possibility of human error and is examining the vessel's stability and seaworthiness.
- Engineers who've monitored the project say the seaworthiness of the catamaran design is well-established.
- The companies that check ships' seaworthiness have said overstretched and undertrained crews might explain last year's rise in shipping accidents.
- Even to maintain the vessel's seaworthiness certificate will need significant spending.