Re: Why didn't Kirk just contact Sulu?
Esp. when there is a lot of subspace static on that line.
But more seriously with an enemy out looking for you, sending a trnasmission could disclose your location.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.