|A successful core from NT800.|
The MILET is an instrument platform operated from the surface over a fiber optic cable. Mounted to the platform are video and still cameras, a subbottom profiler, and navigation pingers that report its position while data is transmitted to the surface in real-time. We use the MILET to survey the mobile fauna and record subbottom features for the geologic record. A typical MILET survey lasts about four hours on the bottom and records data on long transects that criss-cross the sampling location. Two and one half hours into the survey at NT1000, we lost fiber optic communications with MILET due to a faulty connector.
Weatherbird II then proceeded to the S42 sampling site. Seas were choppy with heavy local rain squalls. Completed a CTD profile before beginning with the multicore We had a failed multicore on the first lowering. The VTLC showed another pre-trip in the water column, so the winch operator and helmsman adjusted the speed of lowering and put the ship in the trough to reduce pitch. All three subsequent lowerings were successful. Repairs of the MILET are still underway, so WB2 got underway toward S35 in the early hours of 1 June.
|Ben LaBelle, Nikki Morgan, and Curtis Okolovitch sieving cores late at night|
frame showing two additions—cylinder on left is a |
USBL navigation pinger that provides bottom fixes for all cores,
cylinder on right is the video time-lapse camera that
records core collection and bottom type.
Florida State University