beam vs length
11 foot beam is quite narrow for a boat that long with a beam over 12'' being more normal for a boat this length. This sounds like an older design or a down wind sled. Narrow beam, especially when coupled with comparatively shallow draft for a boat that long suggests a tender boat, one that would not stand well to a reasonable sail plan up wind or in heavier winds. The extremely short rig suggests that this is infact the case.