  In this paper, we undertake a systematic model and valuation theoretic study
of the class of ordered fields which are dense in their real closure. We apply
this study to determine definable henselian valuations on ordered fields, in
the language of ordered rings. In light of our results, we re-examine the
Shelah-Hasson Conjecture (specialised to ordered fields) and provide an example
limiting its valuation theoretic conclusions.
