Storm petrels may also be found at the reserve of Haaf Gruney. Another "Far Haaf" was built and launched in 1993. Other traditional methods of salmon fishing using "haaf nets" have also declined. It is a former centre for haaf fishing, and has a shingle beach. D-Troop remained at HAAF during this time. The play premiered at London's National Theatre with Jochum ten Haaf in the title role. Hypoglycemia-associated autonomic failure (HAAF) can occur if left untreated.