Arosa

ex Roska

Built 1930Auxiliary KetchBute Slip Dock

Arosa is an auxiliary ketch designed by A. Mylne & Co. as Design 328 and built by Bute Slip Dock in 1930. Originally named Roska, she is constructed of wood with a length of 51 feet on the waterline, a beam of 15.8 feet, and a draft of 9.5 feet. Her sail area is recorded as 2,485 square feet. The vessel remains in existence.

Ownership

No ownership records held for this vessel.

Crew

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Specification

LOA (spar)26.2 m · 86 ft
LWL15.5 m · 51 ft
Beam4.8 m · 16 ft
Draft2.9 m · 10 ft
Depth3.1 m · 10 ft
Sail area2,485 sq ft
Gross tonnage37.86
Net tonnage36.06
TM tonnage62

Details

Built1930
BuilderBute Slip Dock, Bute
ConstructionWood

Registry & Identity

Signal lettersMPTY
Official no.161783

Design Archive

Archive drawing — Arosa
Sail Plan

Design No. 328

Arosa

Designed 1930

Auxiliary Ketch

View in design archive

Sister Yachts

2 other vessels built to the same design.

Historical Context

Design 328, created in 1930, falls within A. Mylne & Co.'s established period of yacht design activity in the interwar years. The office, founded in 1896, developed a strong reputation for practical, seaworthy designs across a range of yacht types and sizes. The auxiliary ketch was a natural evolution in Mylne's design repertoire, combining traditional sailing qualities with the flexibility of mechanical propulsion. Bute Slip Dock, situated on the Isle of Bute off the west coast of Scotland, was one of several quality builders with whom Mylne collaborated. The 1930s saw continuing demand for cruising yachts among private owners, and vessels of Arosa's dimensions and capability were well-suited to that market. Her retention of the original Mylne design lines, combined with her wooden construction, places her within the tradition of Scottish yacht building that characterised the Clyde and surrounding waters.

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