Righting capabilities CB
The Tartan 37 rig was heavily influenced by the then popular IOR racing rule. As a result it carries a sail plan that has a small very high aspect ratio main sail and depends on very large headsails in light to moderate winds. That is backwards of the current thinking towards larger mainsails, fractional rigs and smaller bearly overlapping headsails for short handed offshore designs.
When you have a rig that depends on larhe headsails for lighter to moderate conditions, you end up either carrying a larger sail inventory to deal with the full range of sailing conditions or else resorting to adding a removeable jibstay and staysail, or else motoring more than is ideal at the lower end of the wind range and being overpowered at the upper end.
Modern fractional rigs are easy to depower rather than reef and their headsails work well through a wider range of windspeeds. When it comes time to reef they shorten down to very snug masthead rig with a sail the size of a staysail already flying.