Some Odyssey biologicals, especially the bacteria, can be pretty frustrating to search for. The draw distance comes pretty heavily into play too. As you need to travel a bit to archieve the genetic diversity, it's quite natural to use the SRV and the SRV should have some tools to help beside aiming things with the composition scanner to see if it blips. Adding biological signal to the SRV wave scanner seems like an obvious solution to me. In fact, I suggest 2 kinds of signals: One for biologicals in general and other for the kind you currently have a partial sample for.