Treasure Charts mark locations on the Great Sea where sunken treasure chests can be salvaged using the Grappling Hook. A glowing spot appears on the water surface at the correct location when you are nearby. Standard Treasure Charts (1-41 listed here) primarily reward Rupees, though a few yield other charts or even a Piece of Heart. They are distinct from Triforce Charts, Special Charts (like those leading to Great Fairy locations), or the IN-credible Chart (HD version).
Treasure Chart Guide (Charts 1-41)

Treasure Chart #1
Acquisition Location: Forbidden Woods (F6)
How to Obtain: Inside the Forbidden Woods dungeon. In the large, tall central room (Room 10 on dungeon map), reach the highest wooden platform via propeller flowers. The chest is visible there.
Treasure Location: F5 (Six-Eye Reef)
Reward: 200 Rupees

Treasure Chart #2
Acquisition Location: Windfall Island (D2)
How to Obtain: After rescuing Aryll, talk to Maggie’s Father (the formerly poor man, now rich) in his upstairs manor. Give him 20 Skull Necklaces (dropped by Moblins).
Treasure Location: D6 (Flight Control Platform)
Reward: 200 Rupees

Treasure Chart #3
Acquisition Location: Forest Haven (F6) – Requires Treasure Chart #28 to locate treasure.
How to Obtain: Salvage the treasure chest indicated by Treasure Chart #28.
Treasure Location: C5 (Stone Watcher Island)
Reward: 200 Rupees

Treasure Chart #4
Acquisition Location: Rock Spire Isle (B3) – Beedle’s Shop Ship
How to Obtain: Purchase from Beedle’s special Shop Ship found circling Rock Spire Isle for 900 Rupees.
Treasure Location: E1 (Southern Triangle Isle)
Reward: Piece of Heart

Treasure Chart #5
Acquisition Location: Wind Temple (C1)
How to Obtain: Inside the Wind Temple dungeon. In room B1 (large central chamber with fan), drop down and find the chest in an alcove on the lowest level.
Treasure Location: D1 (Thorned Fairy Island)
Reward: 200 Rupees

Treasure Chart #6
Acquisition Location: Tower of the Gods (E4)
How to Obtain: Inside the Tower of the Gods dungeon. After obtaining the Hero’s Bow, return to the first floor main room (1F). Shoot the eye switch high on the wall to reveal a chest containing the chart.
Treasure Location: G4 (Seven-Star Isles)
Reward: 200 Rupees

Treasure Chart #7
Acquisition Location: Windfall Island (D2)
How to Obtain: Play Salvatore’s Sinking Ships mini-game (located above the coffee shop) for a second time (after getting the Piece of Heart reward) and win within 20 cannonballs. The prize is this chart.
Treasure Location: D3 (Star Belt Archipelago)
Reward: 200 Rupees

Treasure Chart #8
Acquisition Location: Horseshoe Island (A5)
How to Obtain: Play the “Golf” mini-game on the island using the Deku Leaf to blow nuts into holes. Score par or better to open the central hole. Drop down, defeat the two Winged Mighty Darknuts, and the chart appears.
Treasure Location: F2 (Western Fairy Island)
Reward: 200 Rupees

Treasure Chart #9
Acquisition Location: Crescent Moon Island (A3) – Submarine
How to Obtain: Find the Submarine near Crescent Moon Island. Enter and defeat all enemies (Moblins and Bokoblins) inside to make the chest appear.
Treasure Location: A3 (Crescent Moon Island)
Reward: 200 Rupees

Treasure Chart #10
Acquisition Location: Crescent Moon Island (A3)
How to Obtain: The chest containing this chart is simply sitting on the surface of Crescent Moon Island.
Treasure Location: G1 (Cyclops Reef)
Reward: 200 Rupees

Treasure Chart #11
Acquisition Location: Dragon Roost Cavern (F2)
How to Obtain: Inside the Dragon Roost Cavern dungeon. On floor 2F (Room 10 on map), cross the lava room using the Grappling Hook on overhead bars. The chest is on the far platform.
Treasure Location: A4 (Horseshoe Island)
Reward: Piece of Heart

Treasure Chart #12
Acquisition Location: Earth Temple (D7)
How to Obtain: Inside the Earth Temple dungeon. In basement level B2 (Room 11 on map), in the room filled with coffins and ReDeads, the chart is in one of the chests.
Treasure Location: C6 (Shark Island)
Reward: 200 Rupees

Treasure Chart #13
Acquisition Location: Two-Eye Reef (B7)
How to Obtain: Destroy all cannons and warships patrolling the reef using your ship’s cannon. A chest containing the chart will appear on the reef.
Treasure Location: D7 (Islet of Steel)
Reward: Secret Cave Chart (Shows locations of secret caves)

Treasure Chart #14
Acquisition Location: Headstone Island (C7) – Submarine
How to Obtain: Find the Submarine near Headstone Island. Enter, defeat all enemies, then use the ropes to swing across the gap to the chest.
Treasure Location: C7 (Headstone Island)
Reward: 200 Rupees

Treasure Chart #15
Acquisition Location: Forbidden Woods (F6)
How to Obtain: Inside the Forbidden Woods dungeon. In basement level B1 (Room 7 on map), in the room with multiple flower propeller platforms over water, find the chest on a side platform.
Treasure Location: B5 (Angular Isles)
Reward: Piece of Heart

Treasure Chart #16
Acquisition Location: Diamond Steppe Island (A6) – Golden Gunboat
How to Obtain: Defeat the unique Golden Gunboat (looks like a standard gunboat but is gold) found sailing near Diamond Steppe Island. It drops a light circle containing the chart chest.
Treasure Location: A6 (Diamond Steppe Island)
Reward: Treasure Chart #28

Treasure Chart #17
Acquisition Location: Spectacle Island (C2)
How to Obtain: Win Salvatore’s Cannonball mini-game a second time (score 5 hits or more) after obtaining the Piece of Heart.
Treasure Location: E5 (Ice Ring Isle)
Reward: 200 Rupees

Treasure Chart #18
Acquisition Location: Windfall Island (D2) – Auction House
How to Obtain: Win this chart at the nightly Auction House (inside the Rich Man’s house). It’s typically the 4th item offered.
Treasure Location: B4 (Private Oasis)
Reward: 1 Rupee (Intentionally low!)

Treasure Chart #19
Acquisition Location: Four-Eye Reef (D4)
How to Obtain: Destroy all cannons and warships patrolling the reef. A chest containing the chart will appear on the reef.
Treasure Location: C4 (Tower of the Gods) – Salvage near the tower entrance
Reward: Island Hearts Chart (Shows islands containing Pieces of Heart)

Treasure Chart #20
Acquisition Location: Earth Temple (D7)
How to Obtain: Inside the Earth Temple dungeon. In basement level B1 (Room 9 on map), reflect light onto the chest covered in darkness using the Mirror Shield to make it solid.
Treasure Location: F3 (Bomb Island)
Reward: Piece of Heart

Treasure Chart #21
Acquisition Location: Cyclops Reef (G1)
How to Obtain: Destroy all cannons and warships patrolling the reef. A chest containing the chart will appear on the reef.
Treasure Location: G6 (Pawprint Isle)
Reward: Light Ring Chart (Shows locations of light rings for rare treasure)

Treasure Chart #22
Acquisition Location: Northern Triangle Isle (D1) – Submarine
How to Obtain: Find the Submarine near Northern Triangle Isle. Enter, defeat the enemies (Wizzrobes), and use the ropes to swing across the gap to the chest.
Treasure Location: D1 (Northern Triangle Isle)
Reward: 200 Rupees

Treasure Chart #23
Acquisition Location: Windfall Island (D2)
How to Obtain: Play Salvatore’s Sinking Ships mini-game a third time (after getting Chart #7) and win again within 20 cannonballs.
Treasure Location: B1 (Star Island)
Reward: Piece of Heart

Treasure Chart #24
Acquisition Location: Windfall Island (D2)
How to Obtain: Requires the Deluxe Picto Box. Take a color pictograph of Linda (the woman in the orange dress standing near the Chu Jelly Juice Shop). Show this pictograph to the two Gossiping Women standing further up the path towards the windmill.
Treasure Location: F7 (Cliff Plateau Isles)
Reward: 200 Rupees

Treasure Chart #25
Acquisition Location: Cliff Plateau Isles (F7)
How to Obtain: Enter the secret cave on the lower island. Navigate inside using the Deku Leaf and Baba Buds. Near the exit high up on the main plateau, use a Fire Arrow to burn a wooden barrier, then glide across to find the chest.
Treasure Location: E6 (Horseshoe Island) – Correction: Chart description likely meant A4/A5 near Horseshoe based on original, but standard sources place reward here. Let’s mark it A4 (Horseshoe Island) for consistency with common guides.
Reward: 200 Rupees

Treasure Chart #26
Acquisition Location: Six-Eye Reef (F5)
How to Obtain: Destroy all cannons and warships patrolling the reef. A chest containing the chart will appear on the reef.
Treasure Location: D5 (Needle Rock Isle)
Reward: Octo Chart (Shows locations of Big Octos)

Treasure Chart #27
Acquisition Location: Private Oasis (B4)
How to Obtain: Use the Hookshot/Grappling Hook to reach the highest cliff ledge behind the Cabana. The chest is up there. Requires the Cabana Deed to enter freely or smashing the door.
Treasure Location: B4 (Private Oasis) – Note: The chart is found on the island, and the treasure is salvaged nearby.
Reward: 100 Rupees

Treasure Chart #28
Acquisition Location: Diamond Steppe Island (A6) – Requires Treasure Chart #16 to locate treasure.
How to Obtain: Salvage the treasure chest indicated by Treasure Chart #16.
Treasure Location: F6 (Forest Haven) – Salvage near the entrance.
Reward: Treasure Chart #3

Treasure Chart #29
Acquisition Location: Windfall Island (D2)
How to Obtain: Requires the Hookshot. Activate the Windmill by hitting the switch inside the upper level (requires changing wind direction). Ride the gondola to the top, Hookshot across to the rotating platform, then glide using Deku Leaf to the balcony above the Picto Box shop. The chest is inside.
Treasure Location: C2 (Spectacle Island)
Reward: 200 Rupees

Treasure Chart #30
Acquisition Location: Tower of the Gods (E4)
How to Obtain: Inside the Tower of the Gods dungeon. On the second floor (2F), in the room with moving platforms and Beamos (Room 5 on map), find the chest on a side platform.
Treasure Location: E4 (Tower of the Gods) – Salvage near the tower entrance.
Reward: Piece of Heart

Treasure Chart #31
Acquisition Location: Windfall Island (D2)
How to Obtain: Requires the Deluxe Picto Box. Take a color pictograph of the full moon (can be tricky, might need to wait for a clear night). Show this picture to Kamo, the man obsessed with the moon who sits on the steps near the upper archway during the day.
Treasure Location: A1 (Northern Fairy Island)
Reward: Piece of Heart

Treasure Chart #32
Acquisition Location: Three-Eye Reef (A7)
How to Obtain: Destroy all cannons and warships patrolling the reef. A chest containing the chart will appear on the reef.
Treasure Location: B6 (Boating Course)
Reward: Sea Hearts Chart (Shows locations of Pieces of Heart found at sea)

Treasure Chart #33
Acquisition Location: Windfall Island (D2)
How to Obtain: Requires the Deluxe Picto Box. Take a color pictograph of Linda (woman in orange dress) together with Anton (man who walks around town) when they briefly meet near the Potion Shop. Show this pictograph to Linda.
Treasure Location: E7 (Five-Star Isles)
Reward: Piece of Heart

Treasure Chart #34
Acquisition Location: Five-Star Isles (E7) – Salvage Corp Ship
How to Obtain: Find the Salvage Corp ship (with divers) near Five-Star Isles. Talk to the lead diver.
Treasure Location: G7 (Two-Eye Reef)
Reward: 200 Rupees

Treasure Chart #35
Acquisition Location: Wind Temple (C1)
How to Obtain: Inside the Wind Temple dungeon. In room B1 (large central chamber), find the chest in an alcove behind breakable rocks on the lowest level. Requires Bombs.
Treasure Location: C3 (Islet of Steal) – Correction: Chart is on Islet of Steel, treasure is at Gale Isle. Let’s fix: C1 (Gale Isle)
Reward: 200 Rupees

Treasure Chart #36
Acquisition Location: Ice Ring Isle (E5)
How to Obtain: Melt the ice covering the island entrance using Fire Arrows (requires travelling through the frozen path within the time limit). The chest is inside the cave.
Treasure Location: A2 (Forsaken Fortress)
Reward: 200 Rupees

Treasure Chart #37
Acquisition Location: Rock Spire Isle (B3)
How to Obtain: Use bombs or the ship’s cannon to destroy the large boulders blocking access to higher parts of the spire. Climb up and use the Hookshot to reach the highest ledge with palm trees. The chest is there.
Treasure Location: B3 (Rock Spire Isle)
Reward: 200 Rupees

Treasure Chart #38
Acquisition Location: Windfall Island (D2) – Auction House
How to Obtain: Win this chart at the nightly Auction House. It’s typically the 1st item offered.
Treasure Location: C1 (Five-Star Isles) – Correction: C1 is Gale Isle. Five-Star is E7. Let’s fix: E7 (Five-Star Isles)
Reward: Piece of Heart

Treasure Chart #39
Acquisition Location: Dragon Roost Cavern (F2)
How to Obtain: Inside the Dragon Roost Cavern dungeon. On floor 2F (Room 13 on map), in the room with Bokoblins and Magtails near the Boss Key chest, find the chart chest in an adjacent alcove accessible after hitting a crystal switch.
Treasure Location: F1 (Dragon Roost Island)
Reward: 200 Rupees

Treasure Chart #40
Acquisition Location: Stone Watcher Island (C5) – Requires Treasure Chart #3 to locate treasure.
How to Obtain: Salvage the treasure chest indicated by Treasure Chart #3.
Treasure Location: E3 (Eastern Fairy Island)
Reward: 200 Rupees

Treasure Chart #41
Acquisition Location: Five-Eye Reef (G5) – Correction: Five-Eye Reef is E7. Let’s fix: E7 (Five-Eye Reef)
How to Obtain: Destroy all cannons and warships patrolling the reef. A chest containing the chart will appear on the reef.
Treasure Location: G5 (Overlook Island)
Reward: Great Fairy Chart (Shows locations of Great Fairies)