Alkmaar Class tripartite minesweepers. Class of Dutch, Belgian and French minesweepers (active minehunters) build from 1984 onwards. 
Revolutionary build in composite fiberglass as a counter measure against magnetic mines. Disadvantage of fiberglass was that hull rrepairs
were almost impossible and ships could not be lengthened later in a mid-life update.
Six of 15 Ducth ships still in commision, with 10 Belgian ships and 15 French.