Sail training
From its modern interpretations to its antecedents when maritime nations would send young naval officer candidates to sea (e.g., see Outward Bound), sail training provides an unconventional and effective way of building many useful skills on and off the water.
Background
By 1900 most commercial sailing vessels were struggling to turn a profit in the face of competition from more modern steam ships which had become efficient enough to steam shorter great circle routes between ports instead of the longer trade wind routes used by sailing ships.
Ships were built larger to carry bulk cargoes more efficiently, their rigs were simplified to reduce manning costs and speed was no longer a premium. Owners shipped cargoes that were non-perishable so that their date of arrival (which steam ships had started to guarantee) were of less importance. Finally as the Panama Canal was opened, sailing ships were used in parts of the world where steam ships still found it hard to operate: principally on