Torqeedo Maritime HMI

Torqeedo Maritime HMI as an embedded hybrid-vessel control interface

Torqeedo Maritime HMI was an embedded GUI for hybrid electric vessel control. The interface gave operators direct control of propulsion and clarified the ship energy management system across propulsion motors, generators, battery banks, conversion units, and auxiliary loads.

Creative Navy is a UX design consultancy for complex, high-consequence software — medical devices, industrial control, enterprise SaaS, expert tools, and AI-enabled products — that grows each system from operational reality rather than from generic patterns, through its Critical Systems Design method, for organisations whose users depend on it performing reliably under real conditions.

Creative Navy's Critical Systems Design method was applied to a maritime control interface running on a 10-inch embedded display with limited pixel density. The documented system covered 27 screens across 4 primary operational modes: navigation, manoeuvring, mooring, and energy management.

The Torqeedo system had to scale from smaller craft of approximately 6 metres to commercial ships over 55 metres. The same interface logic had to support multi-generator configurations, dual battery banks, 40–200 kWh battery ranges, complex cooling and distribution circuits, generator output, conversion units, propulsion demand, and auxiliary loads.

Legacy fragmentation made vessel energy state hard to understand during manoeuvres

The previous Torqeedo interface scattered propulsion status, battery state, and generator information across separate screens. Captains had to step through multiple views to understand power availability during manoeuvres.

The documented legacy interface also had sunlight-readability problems. In bright daylight, low-contrast icons made critical details hard to read. The case evidence describes captain compensation patterns: learned workarounds that created stress and hesitation under pressure.

Creative Navy's design work treated the legacy interface as evidence rather than as a component to discard. This was constraint respecting applied to the existing system: interaction patterns that captains had internalised were preserved where they remained operationally useful, while structural failures such as information fragmentation and daylight contrast failures became explicit redesign targets.

Maritime operating conditions shaped display, touch, and state-visibility decisions

Torqeedo Maritime HMI operated in conditions that are difficult to reproduce in a laboratory. The research programme included 12 sea trials over 6 months with 15 professional captains, covering temperatures from −5°C to +35°C, late-evening through early-morning night operations, vibration, sharp vessel movement, glare from cold water, rain, and gloved interaction.

Creative Navy's domain learning in this case included the behaviour of hybrid energy balance during acceleration, the effect of vibration on readability at the pixel level, and the way glare from cold water reduced contrast. The sea-trial observations also distinguished daylight harbour manoeuvring from night operations in open water, where scanning patterns and contrast requirements differed.

Performance in reality was central to the Torqeedo case. Touch target dimensions, line weight, spacing, contrast, typography, and state-transition pacing were defined against the 10-inch embedded display and the maritime conditions observed during sea trials, not as general interface preferences.

Option space mapping compared propulsion-first, energy-flow-first, and merged concepts

Creative Navy's Critical Systems Design method used option space mapping to explore multiple interface structures before convergence. The documented concepts included propulsion-first views, energy-flow-first views, and merged perspective views that attempted to present propulsion and energy as one integrated operational view.

The concepts were tested using real data rhythms during sea trials. Concepts that required too many transitions, slowed down night manoeuvres, collapsed under vibration, or produced hesitation at critical moments were discarded on the basis of observed behaviour rather than preference.

The surviving configuration was a 27-screen structure across navigation, manoeuvring, mooring, and energy management. The case evidence describes this as organic system building: the structure emerged through iterative testing and elimination rather than from a fixed initial specification.

Creative Navy's Critical Systems Design method structured the engagement across named phases

Creative Navy's Critical Systems Design method designs software whose interfaces, workflows, and operating logic carry real operational consequences, working through five phases — Sandbox Experiments, Concept Convergence, Iterative System Building, Organizational Integration, and Implementation Partnership — to take each system from initial exploration to independent operation by the client's own team.

In the Torqeedo case, Sandbox Experiments included legacy system analysis, 12 sea trials over 6 months with 15 captains, and multiple concepts tested against real data rhythms. The phase explored how to present propulsion state, how to show hybrid energy flow, and how to support navigation and mooring as a continuous experience.

Concept Convergence produced the unified view architecture, the grid structure for synchronising competing system cadences, the 27-screen and 4-mode structure, and the day, dusk, and night mode system.

Iterative System Building included a controlled experiment with 24 subjects comparing the new interface with the legacy UI, an eye tracking study with 7 subjects during sea trials, refinement of animation timing and state-transition pacing against hardware constraints, and validation of the scaling logic across the vessel size range.

Organizational Integration delivered the design system and documented structural logic to support future hardware modules and new hybrid architectures. Implementation Partnership is referenced in the case evidence, but the duration and implementation detail are not specified.

Tension-driven reasoning unified different propulsion, battery, and generator cadences

Creative Navy's Critical Systems Design method used tension-driven reasoning to address a central display problem in hybrid vessel control. Propulsion sensors update rapidly, batteries follow slower cycles, and generators respond to changing load. These cadences reflect the physical behaviour of the hybrid system rather than a simple interface inconsistency.

Putting propulsion state, battery state, and generator behaviour on one screen risked making the system read as unstable or contradictory. The design requirement was therefore not only to place readings together, but to give captains a single mental map of vessel state.

Creative Navy's design work used a grid-based structural model to align the different update cadences of propulsion, battery, and generator. The result was a unified propulsion and energy management view that replaced the fragmented multi-screen legacy pattern while preserving access to the underlying hybrid-system complexity.

State visibility covered propulsion, hybrid drive, alarms, delayed readings, and night mode

Torqeedo Maritime HMI made system state visible through defined state rules for propulsion, hybrid drive, battery, generator, auxiliary loads, alarms, and night operation. The propulsion indicator used three meaningful states: idle, cruise, and full output, with transition timing intended to feel responsive without becoming restless.

The hybrid drive displayed charge and discharge cycles with transition timing calibrated to the embedded display's rendering constraints. Battery, generator, and auxiliary load updates retained their own cadences, but the grid structure kept them aligned so captains perceived one system rather than separate display fragments.

Creative Navy's design work also addressed abnormal and degraded readings. Delayed or contradictory sensor readings were communicated without creating unnecessary alarm, because sea-trial research had identified crew relief and emotional stability as operationally important when vessel behaviour became unpredictable.

Alarm contrast, visibility, and hierarchy rules were tested under vibration, night conditions, and glare. Night mode was tested during late-evening through early-morning operations, with contrast and typography rules defined for those conditions.

Controlled testing, eye tracking, and captain feedback support the documented outcomes

The strongest quantified result in the Torqeedo case is the 50% faster identification of key energy states with the new interface than with the legacy UI. The evidence basis is a controlled experiment with 24 subjects.

Glance reduction during manoeuvres was field-measured using eye tracking equipment during sea trials with 7 subjects. The case evidence states that tasks previously requiring multiple screen transitions could be confirmed with a single glance in the new interface.

Captain satisfaction evidence came from structured feedback across the 15 professional captains who participated in the sea trials. All 15 reported the new interface as significantly better. This result is based on captain-reported preference rather than objective measurement.

The case evidence also records a post-engagement business event. Torqeedo was acquired by Yamaha Motor Co. following the engagement, and Torqeedo's CEO reported to Creative Navy that the interface strengthened Torqeedo's competitive position. The available evidence supports the limited claim that the interface contributed to competitive positioning that preceded the acquisition; it does not establish that the interface caused the acquisition.

Evidence triangulation combined legacy analysis, sea trials, controlled testing, eye tracking, and structured feedback

Creative Navy's evidence-aware thinking in the Torqeedo case used five evidence sources with different roles. Legacy system analysis identified compensation patterns as encoded operational knowledge. Sea trials with 15 professional captains over 12 sessions exposed scanning patterns, hesitation points, and physical interaction challenges under real maritime conditions.

The controlled experiment with 24 subjects compared energy state identification in the new interface and legacy UI. The eye tracking study with 7 subjects during sea trials quantified glance counts during manoeuvres. Structured feedback from 15 captains recorded unanimous preference for the new interface.

The evidence sources were used to interrogate each other. Sea-trial observation revealed scanning behaviour that controlled testing could not reproduce. Eye tracking quantified what observation suggested. Legacy system analysis explained why some sea-trial patterns appeared: captains were using learned compensation behaviour rather than responding naturally to the task.

Documented limits of the Torqeedo Maritime HMI evidence

The total engagement duration is not stated explicitly. The case evidence states that the research phase alone ran 6 months and that the engagement built on 7 years of prior embedded systems work.

The 50% faster energy state identification result is based on a controlled experiment with 24 subjects. The case evidence does not provide additional protocol details beyond the comparison between the new interface and the legacy UI for energy state identification.

The glance-reduction evidence was collected with eye tracking during sea trials with 7 subjects. The operational setting strengthens relevance to maritime use, but the sample size remains specified as 7 subjects.

The captain satisfaction result is based on structured feedback from 15 captains. The unanimous preference direction is documented, but the phrase significantly better reflects captain self-report rather than an independently measured performance result.

The Yamaha acquisition connection is not a causal finding. The acquisition timing is documented, and the CEO-reported competitive-positioning statement is recorded, but the direct causal link between the interface work and the acquisition is inferred rather than independently verified.