The Yosemite with its blast shield deployed
A blast shield was a force field that could be deployed to reinforce the cockpit windows aboard a shuttlecraft during dangerous situations.
The Shuttlecraft 12648 was equipped with blast shields. (SNW: "Under the Cloak of War")
By 2380, the Type 6A shuttlecraft Yosemite had been recently equipped with a new blast shield. (LD: "Envoys")