LotHS is quite good for land-based scenarios, but falls down for the naval portion of the game, since the sailing rules, and combat system are a bit abstract.
For keeping track of a ship's crew, letting them gain experience, and fighting balanced battles, it does a pretty good job.
For vessel to vessel combat, other systems are better, e.g. Sailpower, or Thoroughbred's Prevailing Winds rules. The latter was written for the War of 1812 lake battles, but they can be easily converted to offshore combat using sloops, brigs, and other vessels.