Corrected opening hours in corresponding tag
Changed VHF channel to valid value and corrected opening hours
Added data for Ritterhude lock and Dammsiel lock
Added data for Ochtum locks in Bremen and corrected Oldenburg lock
Added data for both Düthe lock
Added data for both Hilter lock
Added data for both Hüntel lock
Added data for both locks in Hanekenfähr
Added data for Emsbüren Listrup lock
Added data for Rheine Bentlage lock
Added data for both Ems locks in Rheine
Changed opening hours for Hamm lock, added seamark type and seamark name
Added seamark type and name to Havelbert lock and Gülper Kahnschleuse lock
Added several data to Niegripp locks
Added seamark data for Rothensee lock
Changed tagging at several locks according to https://wiki.openstreetmap.org/wiki/DE:Key:lock