> Ocean floor topography also helps identify underwater hazards
You think the ocean is mostly empty, until your nuclear powered attack submarine runs into a previously uncharted (or incorrectly charted) submarine mountain
On 8 January 2005 at 02:43 GMT, San Francisco collided with an undersea mountain about 364 nautical miles (675 km) southeast of Guam while operating at flank (maximum) speed at a depth of 525 feet (160 m).
You think the ocean is mostly empty, until your nuclear powered attack submarine runs into a previously uncharted (or incorrectly charted) submarine mountain
https://www.cnn.com/2021/11/04/asia/submarine-uss-connecticu...
https://www.npr.org/2021/11/02/1051422572/navy-submarine-nuc...
It's happened more than once...
On 8 January 2005 at 02:43 GMT, San Francisco collided with an undersea mountain about 364 nautical miles (675 km) southeast of Guam while operating at flank (maximum) speed at a depth of 525 feet (160 m).
https://en.wikipedia.org/wiki/USS_San_Francisco_(SSN-711)