Astronaut Maneuvering Units. NASA Quest, archiviert vom Original am 18. Juli 2012; abgerufen am 28. Januar 2022 (englisch): „SAFER features the same maneuverability as the MMU but because its nitrogen tank only holds 1.4 kilograms of nitrogen gas, the total velocity change possible with the unit is 3.05 meters per second.“
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Astronaut Maneuvering Units. NASA Quest, archiviert vom Original am 18. Juli 2012; abgerufen am 28. Januar 2022 (englisch): „SAFER features the same maneuverability as the MMU but because its nitrogen tank only holds 1.4 kilograms of nitrogen gas, the total velocity change possible with the unit is 3.05 meters per second.“