idk surface wakes are pretty easy to spot at night especially when the luminescent plankton light up from the disturbance
The smaller the wake, the harder to spot given that there usually are white caps and waves breaking close to shore. It should be lost in the "clutter". If you really happen to be inserting in a glassy smooth and calm bay, well ... super low speeds then?
Consider the really really old school alternative of being dropped off shore by a RHIB and swimming in with rebreathers. It's a struggle to maintain capabilities in the face of that kind of onerous physical requirements (even with Diver Propulsion Vehicles-Scooters).
That's also partly the impetus behind semi-submersibles designs such as the JFD Seal but these carry the same issues as RHIBs of larger deployment footprint and signature (while deploying). All methods are trade-offs. The JFD Seal ticks all the boxes but is a very expensive method of inserting operators which limit their training and use to certain T1 units?
These eMotor surf boards are probably a lot cheaper to deploy. They are also, signature wise, kind of in the middle between semi-subs and traditional RHIBs while also not requiring SCUBA trg/apparatus to achieve (not having to train troops for closed circuit SCUBA is a huge plus).
You're still not going to send them into a heavily guarded place. A lot of things need to happen if you want to use this tactic. That includes sending them when you know they won't get spotted easily.
Yeah, Murphy's law still applies.
Goat herder stumbling on Bravo Two Zero. The supposed SEAL foray into NK that got rumbled by some dudes out fishing.
All things being equal, you try to minimise everything you can. Directly inserting into a landing beach is difficult but if can be done, you are in the AO, ready to rock. Inserting outside the AO where it is easier is legit. But one still needs to then sneak your way into the AO ... on foot?
Anyway, the mission set is not all Landing Beach related. There are other taskings which can be naturally done via landing in less dense areas and moving through non hazardous areas. For that, this eMotor surf board can be part of the toolkit.