These were the same waterways where Captain Denham, aboard the Herald, payed out 14,000 meters of sounding line without finding bottom. It was here too that Lieutenant Parker, aboard the American frigate Congress, was unable to reach the underwater soil at 15,149 meters.
A Congress nevű amerikai fregatt parancsnoka, Parker sorhajóhadnagy, ugyanitt tizenötezer-száznegyven méter mélységben sem érte el mérőónjával az óceán fenekét.