Based on internal records, long-term operational experience, and extensive feedback collected over many years from professional and cave divers worldwide, this type of event is considered extremely rare. It is particularly important to clarify that SUEX has no documented cases of simultaneous failure or detachment of all propeller blades during normal operating conditions.

From an engineering and operational standpoint, the simultaneous loss of all blades would require an exceptional external event, well beyond ordinary use scenarios, and is not consistent with the known behaviour of the propeller system in normal cave diving operations. To date, neither our field data nor our production and quality records indicate any systemic vulnerability affecting this propeller design.

In the very limited number of historical cases involving propeller damage, such events have been associated with prior significant external impacts affecting the propeller assembly. At this time, there is no evidence of any design, material, or manufacturing issue related to the XK propeller. Our quality assurance processes, component traceability, and accumulated operational data do not indicate a recurring or inherent failure mode.

From a functional perspective, it should also be noted that the XK propulsion system is inherently tolerant to partial propeller damage. Depending on the extent of the damage, the DPV may retain the ability to generate propulsion, although with reduced efficiency and increased vibration. While any such condition is clearly not intended for normal use and requires immediate inspection and corrective action, it does not correspond to an immediate or total loss of propulsion by definition.

SUEX fully acknowledges that any propulsion issue occurring in an overhead environment must be treated with the utmost seriousness. This is precisely why, as with all onboard equipment used during cave diving operations, DPVs are employed within a broader system that relies on redundancy, conservative planning, and appropriate safety margins, principles that remain fundamental regardless of equipment manufacturer.

With respect to maintenance and operational best practices, SUEX recommends:

Regular visual inspection of the propeller and hub.

Careful inspection of any DPV that may have experienced an impact prior to further use.

Replacement of mechanically stressed components whenever there is uncertainty regarding their condition.

SUEX firmly believes that technical matters of this nature should be addressed through direct inspection and objective analysis. The public dissemination of unverified claims, particularly those describing failure scenarios that are inconsistent with known technical behaviour, prior to any technical evaluation does not support constructive safety dialogue and reasonably calls into question the genuineness of the underlying intent.

For this reason, SUEX has invited the owner of the unit involved to contact us directly so that the components can be inspected and the event assessed in a factual, transparent, and technically rigorous manner.

SUEX remains fully committed to professionalism, engineering integrity, and the support of the global diving community. Our priority is, and has always been, to deliver reliable equipment and to promote safe, informed, and responsible diving practices.

SUEX Technical Team