Terry Frost was based in St Ives, a harbour town and a centre for abstract
art. There he made a series of works inspired by the boats in the harbour, in which diagonal and curving lines intersect. These lines echo the shapes of the boats and their rocking motion, the curves of the ropes that secured them, the arcs of the swaying masts and the small waves coming into shore.
Frost was associated with a group of ‘Constructionist’ artists committed to non-representational art. He and they frequently based works like this on geometrical proportions
such as the Golden Section.