Man pages matching name net::gpsd3::return::watch in section 3pm:

Net::GPSD3::Return::WATCH.3pm.en	debian 10 / libnet-gpsd3-perl
Net::GPSD3::Return::WATCH.3pm.en	debian 11 / libnet-gpsd3-perl
Net::GPSD3::Return::WATCH.3pm.en	debian 12 / libnet-gpsd3-perl