I wouldn't think that Oasis would use their "Rescue Vessels" for tenders given the hassle of lowering them to the water, then back up once it's time to leave. I would think they would just stick to the contracted companies they have to use the existing tenders.
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)