The need for an updated mortality rate estimate of discarded Tanner crab in the Alaska bottom trawl fishery and the existence of a RAMP for unobserved bycatch provided an opportunity to evaluate the flexibility of the RAMP approach. As RAMP use becomes more prevalent, an assessment of the strengths and limitations of this methodology is increasingly important. We contributed to this assessment by evaluating whether a RAMP, once established for a species in a given fishery, can be broadly used for a fishery and for different types of fishing mortality (discard and unobserved bycatch). We did this by creating a RAMP for Tanner crab that are discarded in the bottom trawl fishery in the Gulf of Alaska and then comparing this to the previously established RAMP for unobserved Tanner crab bycatch in the bottom trawl fishery in the Bering Sea (Hammond et al., 2013). From here on, our study will be referred to as the “Discard-mortality” study and the study completed by Hammond et al. (2013) as the “Unobserved-mortality” study.