In 1988 two Air Shows took place in the Netherlands : one at Deelen Air Base on July 1st , celebrating 75 years of Dutch military aviation and one off-shore at Scheveningen Beach on June 4th. Highlight of the Deelen Air Show was the first performance in the Netherlands of the Swiss demoteam La Patrouille de Suisse , at the time still equipped with Hawker Hunters.
In the afternoon of October 19th , 1983 an aircraft-spotters meeting took place at Volkel AB . Hans was one of about two hundred enthusiasts who were present and took the opportunity to make pictures of some of the last operational Dutch (T)F-104 Starfighters of 306 squadron, 312 squadron & the All-Weather Flight (CAV) as well as some of the first General Dynamics F-16’s issued to nr. 311 squadron. An NF-5B from Eindhoven , a Dutch Navy Orion from Valkenburg and a Bölkow-105 helicopter made this well-spent afternoon complete.