411 REFERENCE · Wiktionary
HMRG Deep
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
From the Hawaiʻi Mapping Research Group, which performed a sonar survey of the region in 1997, and discovered the deep.
Proper noun
en @former name of:Sirena Deep deep trench/Mariana Trench ocean/Pacific ; second deepest place in the Mariana Trench, and third deepest place on Earth.
Coordinate terms
en Challenger Deep
en Horizon Deep