After a successful five to 1,500 meters, Alvin begins a transit south to continue test dives closer to Puerto Rico.

The first two open-water dives are in the book, with the sub descending to 100 meters Wednesday and Thursday to complete Phase 2 of Sea Trials. As much as the…

Alvin passed another critical milestone yesterday with its first untethered post-overhaul dives.

Alvin completes incline test, paving the way for open ocean dives. How simulated dives debug Alvin’s software before actual dives take place.

Alvin finishes in-water tests of electrical and mechanical systems and dives briefly to test the variable ballast system.

Alvin began its road back to diving with a test of its buoyancy.

Atlantis left Woods Hole around 2:45 yesterday with a storm building across our path to Bermuda, so we’ve taken a westerly course parallel to the coast with plans to turn…

Atlantis hasn’t left the dock in Woods Hole yet and Alvin hasn’t touched the water since the completion of its upgrade, but the sub’s sea trials have already begun. “Sea…