On p. 84 in the core rulebook, under the Performer skill, you can find this charming little text:
"The Explorer may make a Difficult (-10) Performer (Storyteller) or Perfomer (Singer) Test instead of Charm,..." "...when used to improve Morale,a succesful Test adds +5 to the ship's Morale, with and a additional +10 for every to Degrees of Success, for the duration of the combat."
So you goad your armsmen to combat by singing a hearty tune? Something must be very wrong here. The other main Extended action style way to shore up Morale is the use of disinformation. I would have expected some sort of use of Command or Intimidation to achieve these results. Not the captain going "Don't worry about the invading orks, I hear they can't stand the sight of blood anyway, and here's a little piece I wrote earlier this morning..."