The fin and head of a killer whale surface on the foreground between two small boats with forested mountains behind them.
An orca slightly breaches the water between two boats in Alaska.
  • Orcas have been ramming, damaging, and sometimes sinking boats in the Strait of Gibraltar.
  • From fog horns to bottles of urine, sailors are trying some wild ways to save their yachts.
  • Some techniques are more successful than others.

Late last month, orcas sank another yacht. The "Grazie Mamma II" was sailing off the coast of Spain and Morocco when a pod of orcas zoomed up and started attacking its steering fin for 45 minutes, Insider reported.