[THEBERBSTER]

SH5 TWOS has a working Enigma machine where you can decode your BDU messages and send messages.
SH5 also has KSDCommander which keeps an account of your career and awards.
A unique function is you can see what other gamers are up to with their careers, realism settings and the mods they are using.
There is also a Bar where you can send messages.
Regarding Sailor Steve's comments on the merchant side there are around 46 ships, including freighters, tankers, troop transports, covering the European theatre in the recognition manual.
Graphics is where SH5 scores highly over SH3.
Whether using sobers mega mod or Vecko's TWOS these are active modders.
LSH3-2015 mega mod is highly recommended and comes with a dedicated version of SH3Commander and also the HSIE V16B1 patch.
The SH5 mega mods and modded SH3 (GWX3.0) and other addon options all can give good levels of immersion which can be customized to your own liking.
LSH3-2015 there is an updated version due in 2017.
Although some what behind schedule it does have active modders involved so the future still looks currently bright for SH3 gamers.
Peter