
- BGG rank
- BGG #4,316
- BGG rating
- 7.4
2nd Fleet: Modern Naval Combat in the North Atlantic
- 1–2 players
- 240–1200 min
- Complexity 3.4/5
- 1986

Expansion for Harpoon 4: Modern Tactical Naval Warfare
Rules assistance for Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

What would you like to know?
Answers come from the official rulebook, with the page to check.
Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons is an expansion for Harpoon 4: Modern Tactical Naval Warfare for 2 players, 180 minutes per game, and ages 12 and up. It was designed by Adrian Davis and its main mechanics are Hexagon Grid.
Publisher Blurb: Whenin this volume are the various Harpoon data annexes, containing new data pertinent to the Pacific Rim countries covered in the background & scenario booklet. Annexes C-M provide statistics for weapons and sensors not listed in Harpoon, as well as some systems added to the system since the original rules set was published, and some errata.
Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons supports 2 players according to the catalogue. This is the publisher’s listed player count, so the game is designed for exactly that number of participants. Variants for other group sizes, if any, are described in the rulebook of your edition, so check it before setting up a different configuration.
The listed playing time for Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons is 180 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons for ages 12 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons has a complexity rating of 3.0 out of 5 from BoardGameGeek players, which makes it a medium-weight game. The rating reflects how much rules knowledge, planning and decision-making a typical game demands. Expect a longer first teach for heavier games, and use a preparation guide before game night.
Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons belongs to these categories: Wargame, Nautical, and Modern Warfare. Its main mechanics are Hexagon Grid. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The credited designers of Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons are: Adrian Davis. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists Sea of Dragons: Data Annexes – Ships, Aircraft, & Weapons as an expansion for Harpoon 4: Modern Tactical Naval Warfare. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Harpoon 4: Modern Tactical Naval Warfare to use it. Check that your edition of Harpoon 4: Modern Tactical Naval Warfare is compatible, as some expansions were revised between editions.