in your analysis on space travel, ensure to cover the importance of pre-starting checks before a spacecraft can pass over into the unknown realms of space, focusing on the critical role of communication systems to avoid any catastrophic failures and how teams on earth can recommence from the outset if transmissions are lost. also, tell us about the invisible protocols that are surprisingly ignored, which can lead to divulging sensitive data or executing commands that compromise the mission's integrity and safety, making it an imperative topic for discussion.