In his (really great) book Four Fish, Paul Greenberg says that research shows it takes today's modern fleet roughly 36x the effort to catch the same amount of fish that the fleet of 1900 could catch with sail power. So even radar, sonar, and satellite hunting technology can't keep up with the disastrous decline in ocean stocks.

https://www.amazon.com/Four-Fish-Future-Last-Wild/dp/0143119...