Underwater scenes often look effortless on screen. On set, they are anything but. Every adjustment competes with limited breath-hold time, water resistance, restricted visibility, and the simple fact that a director above the surface cannot speak normally to a camera operator below it.
During the underwater production of vivo S60's Starlight Luggage (《星光行囊》), director Li Zitao used DIVEVOLK SeaLink to turn that fragmented process into a real-time workflow. The crew could monitor the pool scene, communicate adjustments, and respond to new ideas without repeatedly stopping the shoot for another surface briefing.
The Hidden Bottleneck in Underwater Direction
Li had already worked around underwater cameras before this production, so he understood where the time disappears. Without a live communication layer, a team may discuss a shot on deck, descend, attempt the movement, return to the surface, review what happened, and then repeat the entire cycle.
“If we did not have this communication system, we would have had to keep getting in the water, coming back up to talk, and going down again,” Li said in a post-shoot interview. “In open water, the time and physical effort would only increase.”
The pool sequence added another constraint: the performer was working on breath-hold and could generally stay underwater for only one to two minutes at a time. That short window had to contain the performance, the camera move, the timing, and any correction the director wanted to make.
Hand signals can cover familiar dive instructions, but they are not a complete language for choreography or cinematography. A note such as “turn later,” “change the camera path,” or “hold that moment before moving” is difficult to communicate precisely once the take is underway. SeaLink gave the production a way to keep the creative conversation active across the waterline.
From Four or Five Attempts to One or Two
The clearest measure of the workflow change was not a technical specification. It was the number of attempts needed to get a usable shot.
Li said that, under a traditional stop-and-brief process, a single underwater shot could require four or five attempts. With SeaLink supporting live communication, the team could often reach the intended result in one or two.
“This was more than doubling efficiency. It made the whole creative process controllable and predictable.”
— Li Zitao, director of Starlight Luggage
That difference matters because underwater production fatigue is cumulative. Every extra reset asks the performer and camera team to repeat a physically demanding sequence. Reducing unnecessary attempts protects energy for the takes that genuinely need refinement and gives the crew more time to improve the image rather than reconstruct the same communication loop.
When the Monitor Creates a New Idea
Real-time communication did more than preserve the shot list. It also gave Li room to respond to what appeared on the monitor.
Most performer movements were designed in advance, while Li concentrated on camera position and movement. But underwater light, fabric, bubbles, and bodies do not always behave exactly as expected. A frame can suddenly reveal a stronger angle than the storyboard anticipated.
Li recalled seeing moments that prompted immediate instructions such as: “Push in, circle from a low angle.” Instead of waiting for the operator to surface, he could relay the adjustment while the visual idea was still fresh and the setup was still in place.
“It became a process of seeing, thinking, and speaking immediately,” he said. “That kind of creative rhythm and freedom was almost impossible in my previous underwater shoots.”
How a Connected Underwater Production Workflow Looks
SeaLink did not replace pre-production. The team still needed a clear scene plan, rehearsed performer movement, camera preparation, and trained water-safety support. What changed was the gap between direction and execution.
- Plan the take on deck. The director, performer, and camera team agree on the movement, framing, and stopping conditions before anyone enters the water.
- Establish the underwater connection. The SeaLink production system connects the underwater smartphone terminal with the surface-side workflow.
- Monitor the frame in real time. The director watches the image instead of waiting until the team returns to review it.
- Call precise adjustments. Camera direction can be changed while the visual problem or opportunity is still visible.
- Review without rebuilding the whole setup. The crew can make a focused correction and preserve the position, lighting, and performance rhythm already established.
This is the practical difference between an underwater camera that only records and a connected underwater production tool. DIVEVOLK's underwater phone housings make the phone usable below the surface; SeaLink extends that phone into a workflow that can include monitoring, communication, and live decision-making.
What SeaLink Changed — and What It Did Not
It is important not to confuse faster communication with automatic filmmaking. SeaLink did not design the choreography, choose the lens, light the pool, direct the performer, or replace the judgment of an experienced underwater operator. It made those decisions easier to communicate at the moment they mattered.
It also did not remove the need for water safety. Breath-hold work should be planned and supervised by qualified personnel. Divers Alert Network's freediving safety guidance emphasizes training and direct supervision — principles that remain relevant whenever a production asks a performer to work underwater.
The strongest production technology is often the technology that reduces friction without distracting from the image. In this case, the creative gain came from giving the director, underwater operator, and surface crew a shared moment of decision.
Why This Matters Beyond One vivo S60 Production
The Starlight Luggage shoot adds a commercial production example to SeaLink's growing range of connected underwater workflows. The same underlying need appears in broadcast, education, scientific documentation, training, and live events: someone below the surface sees or performs something, while someone above the surface needs to understand it now.
DIVEVOLK has already documented SeaLink in settings such as a Zhuhai TV underwater science livestream. A film set has a different objective, but the communication problem is closely related. Waiting until the diver surfaces breaks the flow. A live connection keeps the underwater action inside the wider production conversation.
From Experiment to Standard Production Kit
After the shoot, Li said real-time underwater communication would become a priority for future projects. He also saw potential for using a smartphone as part of more flexible monitoring and shooting setups when the scene called for it.
“This system has shown me new possibilities for underwater creation. Whenever conditions allow, I will include it in the standard setup.”
— Li Zitao
That may be the most useful outcome of the vivo S60 production. SeaLink was not treated as a spectacle placed in front of the camera. It worked behind the scenes, where a production tool earns its place: fewer avoidable resets, clearer direction, faster response to inspiration, and more control over a difficult environment.
Creators planning a connected underwater shoot can explore the existing vivo S60 underwater photography guide, review DIVEVOLK's technical support resources, or contact the DIVEVOLK team to discuss a production workflow.
