"Sparton of Canada T-20 XBT probe"@en . . "SDN:L22::TOOL1388" . "An expendable free-fall temperature probe that provides a profile of measured temperature against depth calculated from a fall-rate model. The T-20 XBT Probe can be used within a maximum depth of 460m, may be deployed at a ship speed of up to 20 knots and has a vertical resolution of 65cm."@en . .