| The sonar that will be used has a frequency of 170 kilohertz and is considered safe for the animals. |
| At the time 14 beaked whales became beached on the same day that U.S. Navy destroyers where engaged in a sonar exercise. |
| Heading aft towards the stern, we found the mizzenmast collapsed, which was why it had not shown up on the sonar. |
| But Balcomb said he is fighting, nonetheless, to prove that sonar is dangerous to orcas too. |
| The search began with methodical, round-the-clock sonar scans of the predetermined search zone. |
| Whilst sound carries better in water than in air, that hasn't stopped mammals from using sonar in the air too. |
