13.1.1 Dredgers
designed to work in conjunction with hopper barges are to be fitted
with permanent rubbing strakes or fenders extending down to their
lowest normal operating waterline. On transversely framed vessels
it is recommended that the side structure in way of the lower edge
of the fender be reinforced by a stringer and/or cross-ties. It is
recommended that, where wooden fenders are fitted to dredgers operating
in tropical sea-water, the fenders be cut just above the deepest working
waterline and a gap be left sufficient to prevent water soaking up
into the fenders.