Two sail reaching

It depends a lot on whether its tight or broad (obviously
not very broad or you'd put the kite up)and that is also
very dependent on wind strength.

As a rule there is tight and that's too tight to really
bear away and head up in gusts and lulls, so the
technique is plenty of kicker and play the sails and run
backwards and forwards along the gunwhale to keep the
boat at optimum trim. The helm will get pretty tired
from playing the main to keep the boat level.

Broader and you'll be bearing away in the gust to get a
bit of depth so that you can keep the speed up by heading
up in the lulls. Again a lot of gunwhale running
required.

You need a bit of kicker so the sail goes in and out like
a barn door. The helm won't get quite so tired from
playing the main since it'll be a bit lighter but it'll
still be going in and out like a yoyo. He'll be using
rather larger helm movements and its very important to
keep the boat upright because it won't bear away in the
gusts if its allowed to heel. In both cases the crew
should be playing the jib in sync with the main and its
important not to oversheet. Its a waste to undersheet
but at least the boat is more likely to accelerate in the
gusts if the sail is a bit on the slack side.

In summary, if its tight, its point the boat at the mark
and play the sheets to keep it powered but level. If its
a bit broader start driving off in the gusts and heading
up in the lulls and play the sheets to keep the boat
level.

In the faster boats beware of the pitch-pole.