The Marianas Trench is the deepest part of the planet, at over 36,000ft (or 12,000m) and the PPC-1 cable system crosses it to reach Sydney from Guam.
The cable finally reached the seabed at 0625 this morning on 2nd May, some six hours after it left the ship. It reached a final depth of 9440m. At the point that the cable touched down, the ship was a further 26km south in ‘only’ 7000m of water.
This photograph shows two graphs of the seabed; the top one is a side profile and the bottom one charts the slopes and dips in percentage terms.
The Trench is about 175km south of Guam and leaves the Tyco Decisive with another 2100km of cable to lay.