Originally named Grebe, Otto was designed and built for Alfred Sladen. It was used by Alfred and his brother Mortimer during their time living at Cleeve Howe (sometimes known as Cleve House) on Windermere. In addition to Otto, Sladen owned SL Bat, which is also now part of the museum collection.  

Otto is fitted with a triple expansion steam engine manufactured by W Sissons & Co of Gloucester and a 1958 boiler by Abbott and Co of Newark. Its riveted steel hull is long and narrow which, in combination with the powerful engine, allows Otto to reach high speeds.  

Beneath the canopy at the stern, Otto could accommodate 10-12 guests for a day out on Windermere. It is therefore the perfect example of how Victorian lake-goers could enjoy a luxurious trip on a private steam launch.  

Otto is now in museum storage awaiting conservation. However, its aft flag holder and steering wheel are on permanent display in the museum’s Conservation Store Gallery.