A few seemingly small and simple items that some may find to be of interest follow.
There were platforms aft and forward. I have seen modern models that show these to be gratings but I cannot find any contemporary plans or models that indicate the use of gratings. This may have been done and I would love to find information based on contemporary sources that gratings were used. Again, no two boat yards did everything exactly the same, but the contemporary plans and contracts I have been able to find never show or mention gratings.
Ships' boats had gunwales, not cap rails. The gunwales had to give support to the tops of the frames, tholes, oars and wash boards (if the boat was outfitted for
them.) The gunwales were relatively thick pieces being from about 2.25" to 4.5" deep on longboats and launches by 2" to 4" thick depending on the size of the boat. Pinnaces were over 3" deep by a little less than 2" thick. Scantlings for all types and many sizes of each type boat can be found in various books as well as the on-line version of David Steel's work as mentioned previously.
The ears are very evident, easy to make and install, and called out in the scantlings but these seem to be left out on most models. Builder's choice but why not include them if they are called for.
There were typically two or more lift rings anchored to the stem and stern post or deadwood which are easily made of copper wire and blackened with liver of sulfur or chemically blackened brass. There are cases where there were additional rings anchored to the keelson and keel. An example is below.
Not all boats were the exactly the same but most, if not all, had both fixed and removable thwarts, especially longboats and launches. The loose thwarts could be removed to carry barrels and other large items when going ashore for provisions. The fixed thwarts usually had standing knees. The main thwart(s) against which a mast(s) rested was about twice the thickness of the others, being in the neighborhood of 4 inches thick and several inches wider.
There were benches for the helmsman and officers aft that rested on the riser and aft most thwart. These were typically about 12" broad wide and 1.25" to 1.5" thick.
Boats with lifting duties would be fitted with a windlass that is anchored in chocks port and starboard about midships I start with square stock and then plane or file the somewhat octagonal shape most often seen in the center portion. There is a set of four square holes towards each end for the bars to be inserted by the crewmen turning the windlass. I drill round holes that match the outside dimensions needed then a very sharp small chisel to square up the holes.
The windlass for boats that carried them can be seen on contemporary plans and models. They were typically 7" to 10" diameter depending on the boat size. Until very recently, I never noticed the slot in the chocks that hold the windlass. I usually make a single hole in the chocks within which the windlass would rotate. I am not at all sure of purpose of having a slot but guessing it is so the windlass can be slid on one side in order to help remove it from the chocks when not needed. I don't know if this was simply a modeler's convention or used on the actual boats. Any thoughts on this are most welcome.
Tholes came in a variety of shapes depending on the era and boat type. Simple pins were commonly used well into the mid 18th century. When wash board were used the tholes were normally slotted pieces of square stock wood sometimes reinforced with knees. Two designs that I have found that are in addition to simple pins follow:
One of my pet peeves is the numbers and locations of the tholes. The fault may lie in insufficient information on some contemporary plans. For example the side view in the drawings below look to have a thole for every other thwart, which is correct. Given just the elevation drawing I can understand how some assume there would be matching thole exactly opposite and none on the adjacent thwarts leaving half the thwarts without tholes/rowers. This was not likely the case as there would be one thole for every thwart on these single banked boats and full sets of pairs on double banked boats. Compare the top and side view to see there are no thwarts without a thole. Not all contemporary drawings show the tholes on the top view, thus causing confusion or forcing assumptions to made. In general, not always, launches, barges, and longboats were those that were commonly double banked. Pinnaces, cutters, and yawls were mostly, if not always, single banked. The first plan elevation view below shows the starboard tholes in black ink and the port tholes in red ink. The top view shows the starboard tholes on every other thwart. The second plan below shows the starboard tholes on the elevation view and port tholes on the top view.