Model boat plans for immediate download cad generated and lofted and/or large-scale scanned and electronically cleaned up. 30 day, 100% satisfaction guarantee. never folded, no shipping, no hassle!. A range of scale and semi scale plans from the publishers of model boats magazine. the majority of plans are intended as working r/c models and subjects include: stean launches, asr’s fishing boats, steam vessels, tugs, warships and various merchant vessels.. Model ship plans & model boat plans. harold underhill plans have been produced to meet the needs of those wishing to build authentic scale ship models,.