Both Tromp-class frigates entered service in 1975/-76. Their primary task was area air defense. They acted as flagships for the COMNLTG (Commander Netherlands Task Group). Their large radome (which housed a 3D radar antenna) is why the ships had the nickname ‘Kojak’, after the bald-headed actor in the famous crime tv-series.

Henk Visser is the author of Royal Netherlands Navy - photos and facts and was an employee at the Dutch Navy Museum.
Jantinus Mulder started his career in the graphic industry and is currently a publisher at Lanasta (Walburg Pers). He is a specialist in the model building of naval ships. He builds models, and has written about model building in various (trade) magazines and books.