The duke did what he could about that. [fact]
On the morning of the ninth more than half the fleet had ignored the signal to lie to and await the enemy. The duke did what he could about that. He held a summary court-martial aboard the San Martín and, on evidence that his order had been received and deliberately disobeyed, sentenced twenty delinquent captains to be hanged. One of the culprits, a gentleman and a neighbour of his at San Lucar, he did have hanged at the yard-arm of a pinnace which paraded through the fleet with its grisly burden. The remaining nineteen were removed from their commands and committed to the custody of the Judge Advocate General, Martin de Aranda.
Garrett Mattingly, The Defeat of the Spanish A…, loc. 819