That’s a 3-Strand Twisted Polypropylene / Nylon Marine Rope
What it’s used for:
General-purpose heavy-duty rope. The white with blue tracer strands is super common for marine, construction, and towing.
Key features from your pic:
1. Material: Shiny, smooth strands = likely PP Polypropylene or Nylon/Poly blend. PP floats on water. Nylon has more stretch + strength.
2. Construction: 3-strand twisted. Easy to splice, strong, and resists kinking compared to braided for some uses.
3. Size: Looks thick — probably 16mm to 24mm diameter / 5/8" to 1" based on the coil. The blue tracer is just for ID, doesn’t affect strength.
4. Tied with yellow string: New coil from the supplier.