The Wanderer model is a shoal-draft keel sailboat with a centerboard designed for cruising.
It is very similar to the smaller Tartan 27, also designed by William Shaw when he worked at Sparkman & Stephens.
The Wanderer is similar to other Pearson boats of the era; for example, the Coaster, which has a full keel but is otherwise identical, and the Vanguard.
[1] It is closely related to the Pearson Renegade, another Shaw design.
With the centerboard up, the Wanderer is one of the shallowest-draft keel boats in its size range.