To enhance the understanding of the effects from an under water explosion, UNDEX, a series of tests were conducted during August and September 2007. The purpose were to collect measurement data of the loading of a stiff target plate with the intent to validate and increase the capability to simulate these effects. A total of 17 tests were performed were the charge weight, charge distances and the charge substances were varied. As target plate a thick plate from the Netherlands were used. A quick comparison with simulations show that trends and certain phenomena in the tests are qualatively represented but some details and the prediction of pressure levels need further investigations. The tests were conducted within the trilateral cooperation between Sweden, Canada and the Netherlands.