Stand on the Cairns waterfront for a while and something becomes apparent.

There is a lot more happening here than tourism.

A luxury yacht may be tied up near a commercial vessel.

Reef boats prepare to carry hundreds of visitors towards the Great Barrier Reef.

Fishing boats come and go.

Cruise ships bring visitors into the region.

And among all this civilian activity, vessels associated with the Royal Australian Navy and Australia's maritime security operations can also be part of the scene.

Cairns may be internationally famous as the gateway to the Great Barrier Reef, but its waterfront is also a working harbour of considerable economic and strategic importance.

It is one of the most interesting places in Cairns to simply walk, look and understand how the city works.

The waterfront helped create Cairns

Modern Cairns is inseparable from its maritime geography.

The city developed as a port during the nineteenth century, initially serving the inland goldfields and later becoming increasingly important to regional agriculture, trade and transportation.

Before aircraft could move visitors across Australia in hours and before highways connected Far North Queensland with the rest of the country, ships were essential.

The waterfront wasn't an attraction.

It was one of the reasons Cairns existed.

That relationship with the sea continues today.

Only the vessels and industries have changed.

The Navy in Cairns

One of the less obvious aspects of Cairns for many tourists is its connection with the Royal Australian Navy.

HMAS Cairns is an established naval base on the Cairns waterfront.

Its location makes strategic sense.

Australia has an enormous northern coastline and maritime territory.

Naval and other government vessels operating from Cairns can support border protection, maritime security, hydrographic activities and other operations across northern Australian waters.

Cairns is therefore not merely a holiday port.

It is part of Australia's northern maritime infrastructure.

For visitors walking around the waterfront, the presence of naval vessels provides an interesting contrast with the recreational and tourism craft nearby.

Why Cairns matters strategically

Look at a map.

Cairns faces the Coral Sea.

Papua New Guinea lies to Australia's north.

The Torres Strait is farther north again.

Beyond are important Pacific maritime routes.

Northern Australia has enormous stretches of coastline and offshore waters requiring surveillance and protection.

Cairns is well positioned to support maritime operations across that environment.

That geographic reality has become increasingly important as Australia invests in its northern defence capabilities.

The same location that makes Cairns an excellent departure point for the Great Barrier Reef also gives it strategic maritime significance.

A shipbuilding and marine-services city

The defence connection extends beyond ships wearing naval colours.

Cairns has developed significant shipbuilding, repair and marine-maintenance capabilities.

A working vessel eventually needs work.

Engines require servicing.

Hull maintenance has to be performed.

Electronic systems need attention.

Commercial and government vessels require refits.

That supports engineers, tradespeople, technicians, suppliers and specialist marine businesses.

The waterfront therefore creates employment that has little to do with selling holidays.

It is another part of the Cairns economy operating beside the tourism industry.

Then come the reef boats

For visitors, these are probably the most familiar vessels.

Every morning, boats prepare to take passengers offshore to the Great Barrier Reef.

Some head towards islands.

Others travel to pontoons and outer-reef locations.

There are vessels carrying snorkellers, divers and sightseers.

The marina becomes a transport hub.

Passengers arrive with hats, sunscreen, cameras and varying degrees of confidence about the sea conditions ahead.

Crews prepare vessels.

Supplies are loaded.

Then boats begin departing.

For a visitor, it is exciting.

For Cairns, it is business.

The Great Barrier Reef tourism fleet is an industry

It is easy to look at a reef boat and see only an excursion.

Look again.

That vessel represents a much larger economic chain.

It requires crew.

Fuel.

Maintenance.

Insurance.

Food and beverages.

Booking systems.

Cleaning.

Marketing.

Diving and snorkelling equipment.

Marine specialists.

Wharf infrastructure.

Tour operators employ people directly, but they also support other businesses throughout Cairns.

Multiply that across the city's tourism fleet and the economic significance becomes obvious.

The waterfront is effectively one of Cairns' major workplaces.

Cruise ships and Cairns

Cruise tourism adds another layer.

Cruise vessels visiting Cairns bring passengers who may spend money on tours, restaurants, shopping and local transport.

Some passengers head straight for the reef.

Others visit Kuranda.

Some travel north towards Port Douglas or explore the rainforest.

Others simply walk into Cairns.

This is where the city's geography provides an advantage.

The waterfront and central business district are remarkably close.

A cruise passenger arriving in Cairns can quickly find restaurants, shops, the Esplanade and other city attractions.

The city does not hide behind its port.

The port is part of the city.

What does a cruise ship mean to local business?

Potentially thousands of customers arriving at approximately the same time.

Not every passenger spends heavily.

Some may remain aboard.

Others may have prepaid excursions that capture much of their discretionary spending.

But collectively, cruise visits create opportunities for tour operators, cafés, restaurants, retailers, transport providers and attractions.

The effect extends beyond the waterfront.

A passenger stepping from a ship in Cairns might spend the day in Kuranda, Palm Cove or elsewhere in the region.

The economic footprint spreads.

Luxury yachts

At the opposite end of the scale from a giant cruise vessel are the luxury yachts and superyachts that use Cairns and the wider region.

They add undeniable glamour to the marina.

But they also represent business.

Large yachts require fuel, food, maintenance, supplies, berthing and professional services.

Crew members spend money locally.

Guests use restaurants, accommodation and tourism services.

Specialist vessels may remain in the region for extended periods.

Cairns' proximity to the Great Barrier Reef and its position on Australia's northeast coast make it a logical destination for cruising yachts.

For the rest of us, they also provide something interesting to look at while walking around the marina.

Fishing boats

Long before reef tourism reached its modern scale, fishing was part of the maritime economy of Far North Queensland.

Fishing vessels remain another element of the working waterfront.

Commercial fishing operates under detailed regulation, with different fisheries targeting different species across Queensland waters.

The seafood eventually appearing on a restaurant plate has an entire industry behind it.

Boats.

Crews.

Licences.

Fuel.

Ice and refrigeration.

Wholesalers.

Transport.

Restaurants and retailers.

Again, the harbour provides a visible connection between the city and the sea that supports it.

Recreational fishing matters too

Not every fishing boat is commercial.

Cairns is a major destination for recreational and charter fishing.

The region provides access to estuaries, rivers, inshore waters and offshore fishing grounds.

Charter operators take visitors chasing everything from reef species to large game fish.

For some visitors, fishing rather than snorkelling is their principal reason for going offshore.

That adds another tourism economy to the marina.

Small boats complete the picture

Not everything floating in Cairns Harbour is enormous or expensive.

Private recreational vessels are part of the scene as well.

Local boat owners use the surrounding waterways and offshore areas for fishing, cruising and recreation.

This everyday boating culture is important because it reminds visitors that Cairns' relationship with the sea isn't confined to industries selling experiences to tourists.

For many residents, access to the water is simply part of living here.

The marina is worth visiting even if you aren't boarding a boat

Visitors sometimes treat the waterfront as somewhere they need to go only when joining a reef tour.

That misses something.

Walk around.

Look at the vessels.

Watch the crews working.

See the difference between the reef fleet, fishing vessels, recreational boats and luxury yachts.

Depending on what is in port, you may see much larger commercial or government vessels as well.

The waterfront provides a constantly changing snapshot of Cairns.

And it costs nothing to look.

Cairns Esplanade adds another waterfront entirely

The working harbour transitions into one of Cairns' most important public spaces.

The Esplanade stretches along the waterfront with walking areas, parklands, recreation facilities and the famous Cairns Esplanade Lagoon.

This produces an unusual combination.

One part of the waterfront is intensely commercial.

Another is recreational.

Elsewhere there are hotels, restaurants and residential buildings.

The sea connects all of it.

Why isn't there a beach in central Cairns?

Visitors seeing the waterfront for the first time sometimes ask this question.

Cairns faces Trinity Inlet and extensive tidal flats rather than a conventional sandy swimming beach.

At low tide, the mudflats become particularly obvious.

They are not a defect in the Cairns landscape.

They are part of an important coastal ecosystem.

For a conventional sandy beach experience, visitors can head north towards places such as Trinity Beach and Palm Cove.

In central Cairns, the Esplanade Lagoon provides the obvious swimming alternative.

Watch the tides

The Cairns waterfront changes dramatically with the tide.

Water that appears expansive at high tide can retreat considerably, exposing broad tidal areas.

King tides can produce the opposite effect, pushing seawater into low-lying parts of the city.

This constant tidal movement is fundamental to understanding Cairns.

The waterfront isn't static.

It changes by the hour.

A waterfront with four economies

Perhaps the easiest way to understand the harbour is to divide what you are seeing into four broad activities.

Defence and government.

Naval and government maritime operations reflect Cairns' strategic northern location.

Tourism.

Reef boats, cruise ships, charter vessels and other operators connect visitors with the Great Barrier Reef and surrounding region.

Commercial maritime activity.

Fishing, ship repair, maintenance and marine services support businesses and employment.

Recreation and luxury.

Private boats, yachts and superyachts reflect another relationship with the Coral Sea.

They all use the same broad waterfront.

That is what makes it so interesting.

A good place to understand Cairns

The rainforest and Great Barrier Reef understandably dominate the tourism story.

But spend an hour walking around the waterfront and another Cairns begins to appear.

You see a regional city that services vessels.

A defence location.

A fishing centre.

A cruise destination.

A base for reef tourism.

A recreational boating community.

And increasingly, a destination capable of servicing sophisticated private yachts.

The waterfront is where many of those identities meet.

Cairns Times View

Don't walk through the Cairns waterfront simply because you are hurrying to catch a reef boat.

Look around.

The vessels tell you something about the city.

A Navy ship represents Australia's northern maritime presence.

A reef catamaran represents one of the country's most important tourism industries.

A cruise ship brings thousands of potential customers into the regional economy.

A luxury yacht represents an increasingly valuable marine-services market.

A fishing boat represents a working relationship with the sea that predates modern tourism.

And the small recreational boats remind us that for Cairns residents, the Coral Sea isn't merely something visitors come to see.

It is part of everyday life.

The Cairns waterfront may provide magnificent photographs.

But it is much more than scenery.

It is one of the places where Cairns goes to work.