Jaki Versatile Structures: Sails & Sea fills every ocean biome with naturally generated ships, each one designed to match the waters it sails in. Cold icy oceans hold Viking draakkars, warm tropical waters host ancient triremes and catamarans, and regular temperate oceans offer a broader selection, including cargo vessels, a 
Villager trading ship, and the rare Illager Galleon.
The mod adds no new crafting recipes or items, making it a pure exploration experience that rewards players who venture out onto the open sea.
All Ships in Sails & Sea
Nine ship types are spread across three ocean biome groups. Spawn weights within each group determine how frequently each design appears relative to the others sharing those same waters.
Spawns In
Rarity
Design
Cold Ocean Ships
The Drakkar is the only ship type assigned to cold ocean biomes, making it the most reliably encountered vessel in Cold Ocean and Deep Cold Ocean waters. Its Viking longship design suits the icy surroundings well, and it sits at the waterline, making it easy to spot while sailing. Players specifically hunting the Drakkar will find it easier to locate than most other ship types since it has no competition for cold ocean spawns.
Warm & Lukewarm Ocean Ships
Warm Ocean and Lukewarm Ocean biomes host four ship types split between two rarity tiers. The Catamaran and Small Catamaran each carry a high spawn weight, making them the dominant vessels in these tropical waters. The Trireme and Roman War Trireme both appear at a much lower spawn weight, and finding either ancient warship variant is a genuinely uncommon encounter compared to the frequency of catamaran sightings.
Both trireme designs sit approximately one block below the waterline, requiring a brief dive to reach their lower decks. Their multi-oar warship profiles make them immediately recognizable against the more compact catamaran silhouettes. The Roman War Trireme and standard Trireme are separate structure types with distinct builds, so both are worth boarding separately when encountered.
Regular Ocean Ships
Regular Ocean and Deep Ocean biomes host the widest variety, with four different ship types sharing the same waters. The Cargo Ship, Villager Trader Ship, and Illager Small Sub all appear with equal frequency, while the Illager Galleon spawns at a weight three times lower than any of them.
Exploring standard ocean biomes will produce regular encounters with the three common ship types long before the Galleon makes an appearance.
The Cargo Ship is a large merchant-style vessel with its hull spanning five blocks below the surface, keeping the deck above water while the lower sections require diving. The Illager Small Sub sits three blocks below the surface with a fully underwater profile. The Villager Trader Ship also starts three blocks below the waterline, but presents a more peaceful merchant aesthetic than its Illager counterpart.
The Illager Galleon has the lowest spawn weight of any ship in the regular ocean group, appearing three times less frequently than the Cargo Ship, Villager Trader Ship, or Illager Small Sub. Use the /locate structure command to hunt it down directly rather than waiting to stumble across one naturally.
Ship Loot Guide
Ships across this mod use nine distinct chest categories, each stocked with a themed loot pool. Understanding what each chest type holds helps players know what they are looking for before they board. Different ships carry different combinations of these chest types, so the loot profile varies between vessel designs.
High-Value Loot
Rare chests are the most valuable chest type in the mod. Diamonds, Emeralds, and Golden Apples appear at equal weight as the top-tier rewards in this pool, with 
Raw Gold and Gold Ingots as secondary prizes. These chests represent the main reason to board any ship encountered, regardless of how large or rare the vessel appears.
Combat Supplies
Armed chests carry ranged and melee weapons alongside supporting materials. Crossbows, Bows, Iron Axes, and Iron Swords are the most commonly drawn items, with Arrows, Flint, Iron Ingots, 
Gunpowder, and String also filling the pool. These chests make ships a reliable mid-game source of combat gear, particularly useful when conventional crafting resources are in short supply.
Pottery Sherds and Armor Trims
Bric-a-brac chests are the source of collectible decorative items on ships. Coast Armor Trim Smithing Templates and Sentry Armor Trim Smithing Templates appear most frequently, while Angler, Archer, Skull, Arms Up, and Blade Pottery Sherds fill the mid-weight slots. Skull Banner Patterns and 
Creeper Banner Patterns also appear at low frequency, giving builders and collectors a reason to search every bric-a-brac chest regardless of ship size.
Provisions and Supplies
Food and interior chests stock the provisions a ship’s crew would carry. Cooked meats, 
Bread, Carrots, Apples, Honey Bottles, Cake, and 
Pumpkin Pie are common finds across both food chest types. Fishing chests add maritime flavor with Fishing Rods, 
Pufferfish, 
Salmon, 
Cod, and 
Kelp. Mob drop chests carry Feathers, Leather, 
Slime Balls, and Bones, while exterior chests hold practical hardware including Torches, Lanterns, Ladders, and String.
Some ships carry 
Redstone chests stocked with 
Tnt, Redstone Blocks, Minecarts, Repeaters, and other redstone components. These provide an unusual but practical haul for players focused on automation and contraption building.
Tips for Success
The Illager Galleon is the rarest ship type in the mod. It generates in regular Ocean and Deep Ocean biomes at a spawn weight of 1, compared to a weight of 3 for each of the other three ocean ship types. When one appears on the horizon, diverting to board it is always worthwhile since they appear far less often than Cargo Ships or the Illager Small Sub.
Different biomes unlock different ship designs, so targeting a specific vessel means seeking the right ocean type. The Drakkar is exclusive to cold oceans, the triremes require warm or lukewarm waters, and the Illager Galleon only appears in regular ocean biomes. Using the /locate biome command to find the relevant ocean type is the most direct approach when any particular ship design has been proving difficult to find.
Partially submerged ships reward preparation. The Cargo Ship, Illager Galleon, Illager Small Sub, and Villager Trader Ship all spawn several blocks below the surface. Depth Strider III boots dramatically reduce the time spent navigating underwater sections of these vessels. Carrying a few Potions of Water Breathing is a practical backup when boarding the Illager Small Sub specifically, as it sits three blocks down with a fully submerged design.
Do not skip smaller ships based on size. The Small Catamaran and other compact designs still carry the full range of chest categories including bric-a-brac chests with Pottery Sherds and Armor Trim templates. The loot system does not restrict rare chest types to only the largest or rarest vessels, so a quick search of any ship encountered is always a worthwhile detour.
Frequently Asked Questions
The Illager Galleon is the rarest ship overall, spawning at a weight of 1 in regular ocean biomes compared to 3 for the Cargo Ship, Villager Trader Ship, and Illager Small Sub. In warm ocean biomes, the Trireme and Roman War Trireme are also rare finds, both appearing at a weight of 1 compared to 5 for each catamaran variant.
No. The Illager Galleon and Illager Small Sub do not have pre-placed mobs. Both structures carry empty spawn override configurations in their worldgen data, meaning no Illagers are placed when the ship generates. The Illager naming reflects the ship’s design aesthetic and loot contents rather than its inhabitants. Standard hostile mob spawning can still occur on ship surfaces at night.
Ships are assigned to biome tag groups covering the six vanilla ocean types: Cold Ocean, Deep Cold Ocean, Warm Ocean, Lukewarm Ocean, Ocean, and Deep Ocean. Biome mods that register their ocean biomes under the same vanilla biome tags should see ships generating in those biomes as well. Compatibility depends on how the biome mod handles its ocean biome registrations.
Rare chests offer the highest-value items: Diamonds, Emeralds, and Golden Apples all appear at equal weight. Bric-a-brac chests are the best source of collectibles, providing Coast and Sentry Armor Trim Smithing Templates and five different Pottery Sherd types. Armed chests deliver useful mid-game combat gear including Crossbows, Bows, Iron Swords, and Iron Axes.
Jaki Versatile Structures: Sails & Sea is part of the JVS family of mods by Jackiefr, which covers different biome categories across separate releases. This entry focuses specifically on ocean content. The mod has no dependency on other JVS entries, so each installs and runs independently, and running multiple JVS mods together is fully supported.
