Cal June Buoys Mooring & Fishing Buoys

Cal June Buoys: Trusted Mooring & Fishing Buoys from Jim-Buoy

Cal June Incorporated, operating under their well-known Jim-Buoy trade name, is a mooring and fishing buoy manufacturer with deep roots in U.S. marine safety. Known through its Jim-Buoy brand, Cal June is a U.S. manufacturer of marine and pool safety equipment that has produced mooring buoys, regulatory buoys, and other essential safety products for over 30 years. Headquartered in North Hollywood, California, Cal June is recognized for durable, Coast Guard-approved designs that withstand harsh aquatic environments.

The Premium Mark V Line: Built for Demanding Conditions

Cal June’s flagship mooring buoys belong to the Premium Mark V series, offered in multiple configurations to suit different vessel sizes and mooring setups. The Model 4400 Premium Mark V features a seamless, rock-hard outer shell with a high-density polyurethane foam core — a construction philosophy repeated across the entire lineup. The hard outer shell is seamless and almost indestructible, with a 3 lb/ft³ high-density polyurethane foam core, and internal Z-shaped rods permanently bonded inside the buoy to prevent wear and eventual loss of flotation.

Two distinct attachment systems serve different mooring strategies. The Rod Style buoys use a non-load-bearing rod with an eye at each end, where the mooring chain attaches to the high-strength bottom eye and mooring pennants connect directly to the chain. For boaters who prefer easier topside access, the Chain-Through (Tube Style) buoys offer a different approach: a hollow PVC tube through which the mooring chain is run to the top end of the buoy, where it attaches to hardware such as a protective collar and ring, allowing convenient access to the strong point for connecting mooring lines.

Fishing & Anchor Marker Buoys

Beyond permanent mooring, Cal June produces buoys purpose-built for fishing and anchoring applications. Their trip-line anchor marker buoy is used by securing a line to anchor trip shackles — it automatically unwinds underwater and marks the anchor location, and includes an anchor buoy and 100 feet of black line. For commercial and recreational fishing, Cal June’s hard-shell net float resists weathering and withstands mechanical damage, using stainless steel rings to hold position on rope, with an absolutely closed shell that will not absorb water.

Why Choose Cal June for Mooring & Fishing Buoys?

• USCG-Compliant Construction: Cal June, also known as Jim-Buoy, is a staple in the marine industry, with mooring buoys and sea anchors manufactured to meet strict USCG standards for commercial and recreational use.
• Indestructible Hard Shell: The rock-hard outer shell is virtually indestructible, resisting impacts, UV exposure, and the relentless punishment of saltwater environments.
• Permanently Bonded Hardware: Stainless steel eyebolts and hardware are permanently bonded inside the buoy, eliminating the risk of hardware pull-out under load.
• Multiple Sizes & Configurations: Mark V buoys are available in diameters from 12” to 30”, with rod-style and chain-through options to match your specific mooring chain size and vessel requirements.

Whether you’re setting a seasonal mooring for a sailboat, marking a productive fishing spot, or flagging an anchor line, Cal June’s mooring and fishing buoys deliver the durability and reliability that commercial mariners and recreational boaters have depended on for decades. Explore the full Cal June brand catalog or browse all mooring and fishing buoys to find the right solution for your application.