pitot-static system
...that an aircraft's pitot-static system allows a pilot to know its airspeed, Mach number, altitude, and altitude trend?
...that an aircraft's <b id="mwCXw"><a class="mw-redirect" href="./Pitot-static_system" id="mwCX0" rel="mw:WikiLink" title="Pitot-static system">pitot-static system</a></b> <i id="mwCX4">(pictured)</i> allows a pilot to know its <a href="./Airspeed" id="mwCX8" rel="mw:WikiLink" title="Airspeed">airspeed</a>, <a href="./Mach_number" id="mwCYA" rel="mw:WikiLink" title="Mach number">Mach number</a>, altitude, and altitude trend?