Mike posted the video of a Royal Marine using a jetpack to move between ships. Application for military use is in progress. It would be a very expensive and vulnerable way of moving troops on the battlefield.
https://finance.yahoo.com/news/watch-marine-zoom-one-boat-190700454.html
But firefighting use is also in progress. Not very practical currently but technology continues to improve. Dubai is currently using jet packs on their waterways:
https://finance.yahoo.com/news/watch-marine-zoom-one-boat-190700454.html
But firefighting use is also in progress. Not very practical currently but technology continues to improve. Dubai is currently using jet packs on their waterways:
Firefighters on jetpacks! This is not a dream! - Owl Connected
Dubai is known for its great wealth and extravagance. Now this city has not one but two jetpack prototypes in planning to be used by their fire department.
owlconnected.com