1) Depending on seastate the speed of a sailingyacht of 38 ft with moderate enginepower shall not exceed 6-7 knots.
It is very unlikely that a warship - frigate - will escort her. Although it is too early to say so. In a discussion with someone of the Dutch Navy
it was said that yachts were not be escorted. (in general).
That such is the case, the Lürssen yacht might have proved. Only the sheer luck that one frigate was very close, prevented the Somali's from capturing this boat.
Secondly the modus operandi of the Somali's have changed. They operrate more southerly of the regular shipping
lane and launch their attacks from motherships. They operate through a wide network of informers, mostly Arab fishingvessels who supply any useful information to the radio-operators of the Somali & Yemenite piratenetwork.
The other way round, around Cape Good Hope, might be a more relevant possibility but then she should give West-Africa a wide berth.
Forget about special escorts by warships.