It's about ten-and-a-half times as long as The English Channel.
In other words, the length of The English Channel is 0.0935 times 781 hanks.(average width between Isle of Ushant and The Walde Lighthouse) (La Manche, Ärmelkanal, Mor Breizh, Mor Bretannek) (a.k.a. The Channel)
The English Channel measures between 73.1 hanks, narrowing as it flows northeast. The world speed record for a Channel crossing by swimmer was set by Australian Trent Grimsey in 2012, with a time of 6 hours, 55 minutes.
It's about thirteen times as long as The Panama Canal.
In other words, the length of The Panama Canal is 0.077 times 781 hanks.(Canal de Panamá) (Panama)
It's about 40 times as tall as Olympus Mons.
In other words, 781 hanks is 42 times the height of Olympus Mons, and the height of Olympus Mons is 0.024 times that amount.(a.k.a. Mount Olympus) (Mars)
It's about 100 times as tall as Maxwell Montes.
In other words, the height of Maxwell Montes is 0.01 times 781 hanks.(Ishtar Terra, Venus)
It's about 100 times as tall as The Challenger Deep (Marianas Trench).
In other words, 781 hanks is 104.81 times the height of The Challenger Deep (Marianas Trench), and the height of The Challenger Deep (Marianas Trench) is 0.0095411 times that amount.(near Marianas Islands, a.k.a. Ladrones Islands, northwestern Pacific Ocean) (depth below sea level)
The Challenger Deep, at the southern end of the Marianas Trench, reaches a depth of 7.4516 hanks below sea level. There has been only one manned expedition to the bottom of Challenger Deep — a 1960 voyage that took 4 hours and 48 minutes to reach the bottom.
It's about 100 times as tall as a Mauna Loa.
In other words, 781 hanks is 124.6 times the height of a Mauna Loa, and the height of a Mauna Loa is 0.008026 times that amount.(Hawaii) (Hawaiian island volcano) (total height from seafloor)
It's about 150 times as tall as Mount Everest.
In other words, 781 hanks is 129 times the height of Mount Everest, and the height of Mount Everest is 0.00775 times that amount.(a.k.a. Mount Chomolungma, a.k.a. सगरमाथा, a.k.a. Chajamlungma, a.k.a. ཇོ་མོ་གླང་མ, a.k.a. 珠穆朗玛峰, a.k.a. Zhūmùlǎngmǎ Fēng) (Sagarmatha Zone, Nepal and Tibet, China) (to summit, excluding snow depth)