In our plans, we don't generally list long-leaf yellow pine as an option, because it's not available here. It fact, it is a good option and frequently used as an alternative to white oak. Like Douglas-fir, there are caveats about yellow pine. Both woods, in the areas where they are common, are used for home construction. Construction grades are not acceptable for boat construction, both from a quality standpoint and because they are not properly dried.
Yellow pine is also a generic term which encompasses a variety of woods.
Today, in a world of consolidation of suppliers and rushed life styles, many home boat builders contact us to ask if they can use woods that really aren't suitable for the wet environment in which boats spend much of their life. In many cases, the caller went to their local building supply store and found that specialty woods were not available. The woods may have been available in lumberyards or from local specialty suppliers, but they had not taken the time to look. We can give recommendations, but it is up to the builder to decide what to use. Which non-marine woods could be substituted depends on how the boat will be used.