Hensen Henk Markus Laan (2 results)

Condition: Good. Original pictorial boards, numerous colour illustrations, 8vo. Signed with small dedication "Safe Sailing" by Henk Hensen on the half title.

STC Rotterdam, hardcover 110 pages, illustrated.ĀOver the years numerous harbour tugs have capsized, often with tragic consequences. Stability is a complex subject and mainly a specialism of naval architects. Tug masters seldom have this detailed knowledge ā" yet they experience the effects of a tugās stability every day when manoeuvring their tug, either free sailing or when assisting ships.Tugs will often be working with towline forces, hydrodynamic forces, steering and propulsion forces at or near their maximum with respect to the vesselās stability.ĀIt is, therefore, not just desirable but necessary for tug masters to have at least a basic idea of the elements of stability. They need to know where the limits are, and what the consequences could be, if tug handling practices donāt conform to the rules of stability in normal circumstance.