Localized Transient Apertures in Gravitic Sidewalls was a Solarian League Navy report.
It concerned the concept of functional gun ports in gravitic sidewalls.
In 1526 PD, a copy of the classified report was obtained by Emperor Gustav I of the Andermani Empire, who began to have the ships of the Imperial Andermani Navy armed with twin-arm missile launchers that could fire both forward out of the open throat of a warship's impeller wedge, but sideways out of gun ports as well. (HHA7.1: TR)