Sinking a Battleship to Form a Coral Reef with Tom Gump
In Sonora, Mexico, a retired naval ship is finding new purpose beneath the sea—supporting marine life, attracting divers and showing how environmental service can strengthen communities.
Introduction
Above Tom Gump’s office desk sit two unusual reminders of what collective action can achieve: a small model of a sunken naval ship and a ship’s wheel presented to him by an admiral of the Mexican Navy.
They are not displayed simply as awards. For Gump, a Rotary International Director for 2026–2028, they represent a larger lesson: one person’s idea can become meaningful environmental action when people build the right partnerships.
The idea came from Rotarian Enriqueta “Kikis” López de Arbesú, supported by her husband, Vicente Arbesu, and a network of Rotary districts, public agencies and technical partners. Their ambitious goal was to prepare and sink a retired military vessel off the coast of Sonora, Mexico, creating an artificial reef—a human-made underwater structure designed to provide habitat for marine organisms.
The project would eventually connect ocean conservation, tourism, peace and Rotary membership.
One Vision, Many Partners
The project began with a simple but challenging question: Could a retired ship be transformed into a place where marine life could gather and grow?
Turning that vision into reality required far more than towing a vessel offshore. The location had to be carefully assessed. The water needed to be shallow enough for sunlight to reach the structure, yet suitable for safe placement and marine colonization. The team also needed environmental reviews, technical expertise, government approvals and a vessel.
“One person, with an innovative idea and friends around the world, can make a difference." Tom Gump
A Rotary global grant, described by Gump as approximately US$180,000, helped support the planning and study process. Six Rotary districts contributed funding, while The Rotary Foundation, the government of Sonora, tourism authorities, the Navy Secretariat and other regional partners became involved.
The Mexican Navy supplied the ship and helped prepare it for sinking. Fuel, oil and other potential contaminants had to be removed before the vessel could safely enter the water.
“It takes a lot of people to get something done,” Gump said. “But again, one idea—with the help of Rotary, all the Rotarians and strategic partners—we get this done.”
That distinction matters. Artificial reefs can provide valuable surfaces, shelter and complexity in places where natural structure is limited, but they must be carefully designed, cleaned, placed and monitored. The Sonora project illustrates that successful environmental service depends on preparation and responsible collaboration—not simply a dramatic idea.
Creating Habitat Beneath the Surface
The coastline described in the presentation is rocky and dry, with relatively little vegetation on land. Beneath the water, the seafloor in the selected area also offered limited physical structure.
A cleaned ship resting on the seabed creates surfaces, openings and sheltered spaces. Algae and small organisms can begin attaching to the vessel, followed by other marine species attracted by food and cover. Over time, this process may turn an empty structure into a more biologically active site.
Key Takeaways
- A retired naval ship was carefully prepared and sunk to create marine habitat.
- Six Rotary districts and multiple government partners helped turn one idea into action.
- More than 1,200 divers visited the artificial reef, supporting local tourism.
- The project helped inspire a new Rotary club among local business leaders.
- Responsible artificial reefs require scientific planning, contaminant removal and long-term monitoring.

According to the project team, marine species began appearing around the vessel soon after it was placed, with visible development continuing during the following year. The artificial reef was therefore understood not as a finished product, but as the beginning of a long ecological process.
The ship is also expected to become part of a larger underwater museum. Plans described during the presentation included additional naval vessels and other retired equipment, such as a helicopter, aircraft, amphibious vehicle and gun turret. The objects would be spaced apart rather than arranged as a continuous barrier, allowing water to move through the site.
The expansion could create multiple habitats and diving destinations. However, its long-term environmental value will depend on continued monitoring, safe preparation and management of visitor activity.
An Instrument of War Becomes a Symbol of Peace
The project carries a powerful meaning beyond its ecological purpose. A vessel once associated with military service has been transformed into a platform for life.
During the Earth Talks discussion, participant Karen Kendrick-Hands described the project as a visible form of peacebuilding: an instrument of war placed underwater to support biodiversity.
That symbolism aligns with Rotary’s wider commitment to peace and cooperation. The project required people from different clubs, districts, professions and public institutions to work toward a common goal. Environmental action became a meeting place for relationships that might not otherwise have formed.
For Gump, those relationships are central to Rotary’s value.
“The best part of Rotary is the friends you make,” he said. Those friendships, he explained, create opportunities to share ideas, find expertise and undertake projects that would be impossible for one person or club to complete alone.
The result is a practical form of peace: people working across institutional and geographic boundaries to create something constructive.
Environmental Service Can Strengthen Communities
The reef’s influence has extended beyond the water. Gump reported that more than 1,200 divers had visited the ship by the time of his presentation.
Those visitors created demand for guides, boats, hotels, meals and other local services. As diving tourism developed, business owners and hoteliers became connected with the project. Some later formed a new Rotary club.
This outcome challenged the assumption that environmental work and membership growth are separate goals. A visible, meaningful project can attract people who want to participate in service, especially when they can see tangible benefits for nature and their community.
“Nobody joins a club to do nothing. They join to do things.” Tom Gump
Gump emphasized that people rarely join an organization because they want to attend meetings without purpose. They join because they want to contribute.
“Nobody joins a club to do nothing,” he said. “They join to do things.”
Projects such as the Sonora artificial reef can provide that sense of purpose. They offer current members a reason to remain engaged while introducing Rotary to new partners, volunteers and community leaders.
One Person Can Start a Movement
Although many organizations contributed, the project began with one person proposing an unusual idea.
That is the lesson Gump keeps above his desk. Individuals do not need to possess every skill, connection or dollar required to complete a major project. They need a credible vision and the willingness to invite others into it.
Rotary’s international network helped connect the original idea with grants, technical advisers, government agencies and local leaders. Its greatest contribution may have been its ability to bring those people together.
As Gump observed, Rotary is not an office or a distant institution. It is the members who act through their clubs and communities.
The Sonora reef demonstrates what can happen when an imaginative proposal is matched with due diligence and shared ownership. A retired ship becomes habitat. A dive site supports local enterprise. A service project inspires new members. An object associated with conflict becomes a gathering place for life.
Practical Takeaways & Implications
The project offers several lessons for clubs and community organizations considering ambitious environmental work.
Begin with the environmental need, not the spectacle. A ship sinking may attract attention, but the project’s value depends on choosing an appropriate site, removing pollutants and establishing long-term monitoring.
Bring technical advisers in early. Marine scientists, engineers, government regulators and experienced grant advisers can identify risks before time and money are committed.
“The best part of Rotary is the friends you make.” Tom Gump
Build a broad coalition. The Sonora project required Rotary districts, The Rotary Foundation, the Mexican Navy, state authorities, tourism representatives and local businesses. Each partner contributed something the others could not provide alone.
Plan for community benefits as well as ecological outcomes. Responsible tourism, education and local employment can strengthen public support, but visitor activity must be managed so it does not damage the habitat being created.
Finally, make the work visible and invite people to participate. Environmental projects can strengthen organizations when members and community partners are given meaningful roles.
The larger message is not that every community should sink a ship. It is that creative environmental ideas can grow when people combine enthusiasm with science, planning and partnership.
About This Earth Talk
Speaker: Tom Gump, Rotary International Director (2026–2028), is a member of the Edina Morningside Rotary Club in Minnesota, USA. A former chair of Rotary International’s Membership Growth Committee and former aide to the RI President, he also chairs the Host Organization Committee for the 2028 Rotary International Convention in Minneapolis.
Date presented: 16 July 2026
🎥 Watch on YouTube: Link
🎧 Listen as a Podcast: Link
📖 Read the Blog: Link not provided
🌱 Learn more / Project links:
- Submerged ships transform into artificial reefs in Mexico
- Sink it and they will come, Rotary Magazine, August 2024

