The Sea Treasures collection log is one of the more time-intensive but rewarding completionist goals tied to Sailing in Old School RuneScape. With 17 total slots, it combines long-term salvaging RNG with a series of straightforward exploration-based tasks. This guide with OSRS Accounts walks you through everything you need to know, from salvaging uniques to collecting all eight medallion fragments and assembling the Medallion of the Deep.

Understanding the Sea Treasures Log
To fully complete the Sea Treasures collection log, you need:
· Eight medallion fragments
· The Sailor’s Amulet
· One unique item from each salvaging spot
The salvaging uniques are the most time-consuming part. Each unique has an approximate drop rate of 1 in 3,000 salvages, and variance can be extreme. Some players get lucky early, while others go dry for 7,000-8,000 attempts. Because of this, it is strongly recommended to work on salvaging while training Sailing toward level 99, rather than saving it for afterward.
Once you obtain a salvaging unique, head to the Varrock Museum and speak to the Curator. Select the dialogue option indicating you found something strange while salvaging. Each item must be turned in individually, but doing so grants a Kudos point and an experience lamp. These lamps can be used on any skill; many players choose Sailing to further offset the grind.

Medallion Fragment Locations
The eight medallion fragments are far less grindy and can all be collected relatively quickly.
1. Dognose Island
Travel to Dognose Island, ideally by sailing from the Pandemonium. Locate the rusty chest and repeatedly attempt to pick the lock. No lockpick is required. The fragment is RNG-based but usually obtained within a few minutes, along with coins and Thieving experience.
2. Great Conch - Coral Reef
Equip a fishbowl helmet and diving apparatus. Teleport to the Great Conch using Fairy Ring code CJQ. Head to the coral farming dock, climb down, and investigate the coral reef to receive the fragment.
3. Onyx Crest Pirates
Sail to the Onyx Crest from the Great Conch. You can obtain this fragment by either killing or pickpocketing pirates. Pickpocketing requires 60 Thieving and is often faster.
4. Atrocious Island - Raccoon Offering
Sail to Atrocious Island from Deep Fin Point. Bring any piece of fruit, such as a watermelon, banana, or papaya. Locate the raccoon in the northern area and use the fruit on it to receive the fragment.
5. Port Roberts - Silver Stall
Teleport to Port Roberts using the Sailor’s Amulet, or sail there manually. In the market area, steal from the silver stall until the fragment is obtained, which often happens quickly.
6. Shimmering Atoll - Teak Tree
From Deep Fin Point, sail west to Shimmering Atoll. Bring an axe. Run to the far side of the island and chop a teak tree to immediately receive the fragment.
7. Isle of Bones - Cauldron
Travel from the Void Outpost or Pest Control teleport, then sail to the Isle of Bones. Locate and investigate the cauldron to obtain a blue medallion fragment.
8. Crab Monument
From the Isle of Bones, sail directly to the Crab Monument. Charting it rewards the final fragment and unlocks the Crab Dance emote.

Assembling the Medallion of the Deep
Once all fragments are collected, they cannot be combined immediately. Head to the Pandemonium bar and search a crate to obtain the Waterlogged Journal. After reading it, you can combine the fragments to create the Medallion of the Deep.
This amulet allows underwater exploration without diving gear, freeing up inventory and bank space. While it does not currently work on Fossil Island underwater areas, it remains useful for coral farming and is required for a Master Treasure Trail step, making it well worth acquiring.

Final Thoughts
Completing the Sea Treasures collection log is a marathon, not a sprint. The salvaging uniques are the true bottleneck, but if you work on them while leveling Sailing, the grind feels far more manageable. The medallion with OSRS Boosting Service fragments, by comparison, are quick, varied, and enjoyable.
With patience and planning, you will reach 17/17 and walk away with one of Sailing’s most distinctive rewards. Happy sailing.