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(UPI) A 59-year-old German man is more than 60 days into his attempt to break the Guinness World Record for the longest time spent living in an underwater fixed habitat.

Rüdiger Koch, an aerospace engineer, has been living and working for two months in an underwater capsule off the coast of Puerto Lindo, Panama, in the Caribbean Sea.

Koch's living space measures about 322 square feet and features a portable toilet, a TV, a computer, a bed, a stationary bike, solar power, satellite Internet and multiple fans.

He said the on-land luxury he misses the most is a shower.

"It's not particularly hard. I don't feel like I'm suffering down here at all, although the hardest part is that sometimes I want to go diving," he told CBS News.

He began his record attempt on Sept. 26 and plans to emerge Jan. 24, after spending 120 days underwater.

The current record for the longest time spent living in an underwater fixed habitat stands at 100 days and was set by Joseph Dituri off the Florida coast in 2023.