Modular Dive Marker

A customizable diving marker for pools and underwater games

Note

Some images in this listing are AI-generated to demonstrate possible applications and concepts.

Every AI-generated image is clearly marked.

The product photos show the actual printed model included in this project. AI-generated images are provided only to illustrate possible use cases and are not intended to represent the exact product.

Overview

The Modular Dive Marker is a fully 3D printable diving marker designed for pools, swimming practice and underwater games.

The system consists of a weighted anchor and a floating buoy connected by a rope. Once placed in the water, the anchor sinks to the bottom while the buoy remains visible at the surface, creating a fixed underwater reference point.

The anchor can also be used without the buoy as a simple diving target.

The design is intentionally modular and easy to customize. An editable STEP file is included, allowing you to modify the model in your preferred CAD software.

Features

Fully 3D printable
Editable STEP file included
Modular design
User-fillable anchor
User-fillable buoy
Adjustable rope length (simply tie a new knot)
No special hardware required
Easy to customize
Designed for remixing

Anchor

The anchor consists of two printed parts.

The rope is inserted through the top opening and secured inside the housing with a simple knot that can be accessed through the side opening.

The bottom cap unscrews and can be filled with almost any ballast material, for example:

Gravel
Small stones
Stainless steel nuts
Screws
Fishing weights
Aquarium gravel

Adjust the ballast amount to match your pool depth and desired stability.

The anchor can also be used without the buoy as a standalone diving target for swimming practice and underwater games.

Floating Buoy

The buoy consists of three printed parts.

Its geometry provides enough buoyancy to float on the water surface without requiring any additional foam or flotation material.

Simply print the three parts, assemble them and attach the rope.

The design is lightweight, durable and easy to customize.

Printing Notes

⚠️ Please do not modify the recommended print settings.

The anchor body has been intentionally designed without top and bottom solid layers.

This allows water to quickly enter the exposed infill structure, preventing trapped air and significantly improving the sinking performance.

The visible infill on the top and bottom surfaces is part of the design and not a printing defect.

Changing these settings may reduce the anchor's performance and prevent it from sinking as intended.

Designed for Customization

This project was intentionally designed to be modified.

Feel free to create your own versions.

Future Buoy Ideas

The included buoy is only one possible design.

Possible alternatives:

Classic buoy
Star
Heart
Diamond
Fish
Shark fin
Turtle
Octopus
Pirate barrel
Treasure chest
Lifebuoy
Flag
Balloon
Pumpkin
Christmas ornament
Ghost
Skull
Crown
Rocket
UFO

Game Ideas

One marker already offers plenty of possibilities:

Dive around the marker
Retrieve the anchor
Underwater navigation
Swimming practice
Diving challenges
Time trials

Using multiple markers opens up even more ideas:

Obstacle courses
Treasure hunts
Team relay races
Underwater slalom
Orientation training
Marker collection games
Custom diving games

Printing

Recommended Material

PLA
PETG (recommended for outdoor use)

Supports

No supports required.

Layer Height

0.20 mm

Infill

15–20%

Assembly

Print all parts.
Insert the rope through the anchor.
Tie the rope inside the anchor.
Fill the anchor with ballast.
Screw on the bottom cap.
Feed the rope through the bottom part of the buoy.
Secure the rope with a knot inside the buoy.
Assemble the buoy.
Adjust the rope length by tying a new knot inside the anchor if necessary.

Included Files

Editable STEP file

Safety

This model is a diving game accessory.

It is not a lifesaving or flotation device.

Always supervise children around water.

Use only in safe swimming environments.

Remix

This project was designed with customization in mind.

Feel free to modify, improve and remix the design.

If you create your own buoy, anchor or new game ideas, I'd love to see your version.

Happy printing and have fun in the pool! 🌊🏊

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