Capsizing of use and can usually be recovered by the crew. Some types of dinghy are occasionally deliberately capsized, as capsizing and righting the vessel again can be the fastest means of draining water from the boat. Capsizing (but not necessarily turtling) is an inherent part of dinghy sailing. It is not a question of "if" but a question of "when". For those who do not want the experience, a keelboat monohull has physics on its side. But even yachts can capsize and turtle in extraordinary conditions, so design considerations are important. Such events can overcome skill and experience; boats need
R-expression R-expression In certain theories of syntax, an R-expression (short for "referring expression") is a category in the three-way classification of noun phrases in binding theory, the other two being anaphors and pronominals. According to principle C of binding theory, R-expressions must be free. R-expressions include names (e.g. Mary, John) and definite DPs (e.g. the cat). In Chomsky's government and binding theory, an R-expression is an overt NP analysed as [-a. -p] (not anaphor and not pronominal), and hence subject only to Principle C of the Binding Theory, namely, that it be free (unbound) in all domains. Examples of typical R-expressions