SWZ Maritime's February issue features an article on the capsizing tests of the new nH 1816 class rescue boats of the Royal Netherlands Sea Rescue Institution (KNRM). The article refers to a article published in "Het Schip" in 1932 with much the same topic. Read it in full on SWZ online.
Whereas the capsizing of modern rescue boats such as the Nine Anna and Jan van Engelenburg were the reason to come up with a new design, accidents in the 1920s with two steam rescue boats caused the search for self-righting rescue boats. Both steam ships capsized and remained upside down causing the death of the crews.
1932 Article in "Het Schip"
According to prof. E. Vossnack in "Het Schip" in 1932, research pointed to the danger of deck overhang. In the article, he explained how new boats such as the Insulinde and Neeltje Jacoba righted themselves after capsizing. You can read the 1932 article in full (please note the article is in Dutch).
Picture: Capsizing test of the new KNRM rescue boat of the NH 1816 class (by SWZ Maritime editor Sander Klos)