A black-space navy is one that can project force outside the borders of its parent nation and into the orbital regions of other star systems. While what actually constitutes such a force remains undefined, there is a requirement for the ability to exercise space control at wide ranges. This also implies self-contained force protection from prowler, warship and starfighter threats and a sustainable logistic reach, allowing a persistent presence at range. Navies currently thought of as black-space navies include the UNSC Navy, the SAF Navy, and the Imperial Unggoy Navy.