Sea and Space

Today’s highlight: Jumping off the ship for a swim in 36,000 ft of deep blue water.   Otherwise a quiet day for us divers, as the Triton team works to prepare the sub for its next dive. We sent out three scientific landers back to the bottom of the trench this morning. They’re now on their way back to the surface with a day’s worth of data. Sadly, their retrieval times fall in the middle of the chef’s burger barbecue, so the Triton guys will have to eat and run, and postpone their beers until everything’s back on deck and secured. 

Limiting Factor is on her way back to the surface after the third and longest dive of our expedition (4 hours on bottom). Fifty-two years elapsed between Trieste’s dive in 1960 and the Deepsea Challenger dove in 2013. We conducted three successful dives in seven days. That’s testament to LF’s innovative design and superb engineering, and those come from the outstanding engineers at Triton Submarines. Thank you Triton! And thank you Victor Vescovo for inviting me along on this remarkable journey!

Our finalé, the third dive of our expedition, was hugely successful. Full duration of 4 hours on the bottom. A travers of about 1 mile in the easternmost shallow basin of the Eastern Pool. What look to be microbial mats and spectacular basal outcroppings at the eastern wall, cut by dramatic canyons. Victor and John got some great pix and videos!

Our sub, the Limiting Factor, is designed to withstand 116.7MPa, That's 100,000 tonnes of pressure bearing down on the complete sphere at Full Ocean Depth (i.e. where I’m going tomorrow). 11,000 tonnes per square metre means there will be 1,500 tonnes of pressure on the viewport and 2,200 tonnes on the hatch. So, over the entire hull that’s akin to the weight of 291 jumbo jets or 7900 double decker buses.   On each viewport that is the weight of 4 jumbo jets.  On the hatch it is 5 jumbo jets or 175 London double decker buses or 1000 large SUV’s.

From Expediton Leader Rob McCallum: Hello LF Fans.   DSSV Pressure Drop is now departing Guam for the Challenger Deep.  The forecast holds promise, the team is focussed, the equipment is ready.   Dive 1 will be June 7th (June 6 in the US). 

We got to our home for the next 10 days around 10 pm last night: the Deep Submergence Support Vessel (DSSV) Pressure Drop I’ve got very nice digs on the main deck, handy to the galley and lounge and one level below our expedition operations area.  I even get a mint in my pillow every evening! The full expedition team met for the first time just before supper. Victor (at right below) talked us through the sequence of dives we’ll make in the Eastern pool of the Challenger Deep during our voyage.  I get to go first. Second to dive will be Vanessa O’Brien, a mountaineer who’s completed the Explorer’s Grand Slam (7 Summits + both poles, as has Victor). Third will be John Rost (dark shirt), who has also completed the Seven Summits. Very interesting company, to say the least!

That’s how you say “g’day!’ on Guam; pronounced “half-a-day”. It took a full 24 hours, but we made it here!  A very strange flying day, to say the least. The three airports we passed through are usually bustling places, so jam-packed with people you can hardly move. There were more sparrows than people inside the terminal at Honolulu today, and maybe 60 passengers aboard the Boeing 777 that took us from HNL to GUM. The longest wait upon arrival now is to clear through the health quarantine procedure.