In the Netherlands 2 organizations take care for the prevention and rescues of bathers and swimmers alongside the Dutch coast. See next links:
First KNRM lifeguards, mainly active at the Waddeneilanden and Wassenaar (2016)
On the next link startpagina you can find all the lifeguards of your interest.
Koninklijke Nederlandse Redding Maatschappij.
This is the lifeboat organization which uses many deep sea going lifeboats 24/7.
All organisations corporate in case of sea-accidents.
A website from New Zealand giving information about the beach types in the world.