We called deck blocks all sheaves designed for fixing on deck or on mast. Deck blocks include horizontal foot blocks, vertical blocks, mast or through deck blocks, organizers and turning sheaves. The wide variety of deck blocks provides solution to many applications, such as vertical, horizontal or pivoting line angles.

Antal realizes a special line of deck blocks which mount Tulip sheaves. Tulip sheaves have a particular groove shape that allows a line lead angle range of 40°. Torsion loads are borne by large lateral ball bearings. Low friction is thus always guaranteed even when the line is deflected. Tulip deck blocks include Tulip foot blocks, Tulip organizers, Tulip vertical blocks and Tulip turning sheaves. Also spare Tulip sheaves are provided for custom applications.