How many people can the boat carry?

The Proline is rated for 12 people, though operators generally allow up to 10 for comfort and gear space.

How far offshore can I go?

Rental restrictions limit outings to no more than five miles offshore and ten miles up or down the coastline from the marina.

What do I need to check in?

Arrive 15 minutes early with valid photo ID; if you were born after January 1, 1988, bring a boating safety certificate.

Is dive gear included?

Dive tanks and full SCUBA setups are not automatically included—bring your own or coordinate rentals with the marina operator ahead of time.

What is the daily rental price?

The listed daily rental price is $500; confirm rates and availability when booking.

Are there protected areas I should know about?

Yes—this part of the Middle Keys sits inside the Florida Keys National Marine Sanctuary; follow anchoring rules, use moorings where provided, and avoid taking or disturbing coral.

Proline Supersport CC: Fishing & Diving Adventures from Marathon, FL | Boat Tour | Fishing

Adventure Brief

Spend a day on the 25' Proline Supersport CC from Grassy Key Marina—built for anglers and divers, with a dive ladder, walk-through transom, and large fish boxes. Launch close to productive Middle Keys reefs and wrecks for efficient, focused time on the water.

4–8 hours

moderate

From $577.50

At Grassy Key Marina in Marathon, Florida, the 25' Proline Supersport CC is a workhorse center‑console built for fishing and diving in the nearshore reefs and flats of the Middle Keys. Based at 59073 Overseas Hwy, this boat combines a 250-horsepower Yamaha four‑stroke, a T‑top for shade, and practical deck features—walk-through transom door, an actual dive ladder for boarding in fins, and generous in-floor fish boxes—that make moving between cast, drop and surface intervals smooth and efficient.

A typical day aboard starts with a quick briefing at the marina, a coil of line and a local map on the dash, and the compact confidence of a hull that handles choppy bays and calm flats alike. The surrounding seascape is distinct: shallow seagrass beds that hold permit and bonefish, coral heads and patch reefs where grouper and snapper patrol, and mangrove fringes that feed juvenile fish to the offshore food web. This stretch also sits inside the Florida Keys National Marine Sanctuary (established 1990), which frames every trip with clear rules and a conservation ethic.

The Proline’s layout makes it equally suited for bottom fishing, wreck-hunting on permitted sites, or dropping lines and gearing up for reef dives. Its limits—no more than five miles offshore and ten miles up or down the coastline—mean most outings stay within the productive patch reef and wreck zones that define Marathon sport fishing. The craft’s rated capacity is 12 people (operators typically allow up to 10), so it’s ideal for a close-knit group chasing a half- to full-day of angling or a drift-and-dive itinerary.

Practicalities matter: daily rentals list at $500; expect to arrive 15 minutes before check-in with valid ID, and carry a boat safety certificate if you were born after January 1, 1988. Weather, tide, and reef closures will define your route more than horsepower, so collaborate with local skippers and check sanctuary notices.

Why book this boat? It’s simple: a purpose-built platform, comfortable deck ergonomics, and a location that gives you immediate access to the Middle Keys’ most productive habitats—all launched from an accessible highway-side marina. For anglers and divers who want efficient transitions between fights and descents, the Proline Supersport delivers a day on the water that’s focused, flexible, and fundamentally about getting more time where it matters—the reef.

Launch logistics are straightforward: Grassy Key Marina sits directly on US‑1, making gear transfers quick and providing fuel and ice. Bring reef‑safe sunscreen, reef hooks and your own dive tanks or coordinate rentals with the marina operator. Consider morning departures for flatter seas and cooler air; afternoons can bring onshore breezes. If you’re new to Keys waters, hire a local mate for navigation and regs—local experience turns raw horsepower into productive days.