[3] While the ships of the Buyskes class were built for performing hydrographic research, the Tydeman was focused on oceanography.

[4] Both ships were built at Boele's Scheepwerven en Machinefabriek B.V. in Bolnes and replaced the hydrographic survey vessels of the Snellius class.

[1][5] They were equipped with the automated "Hydraut" system that allowed them to perform hydrographic measuring.

[13] Blommendal was sold to a maritime foundation, Het Maritiem Kwartier, as a tool to keep the history of older vessels alive and educate people about them.

[14] She remained laid up near the NDSM yard in Amsterdam until 2016 when she was scrapped in Haarlem.