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***Chuck - Raymarine - Moderator***

Welcome to the Raymarine Forum Tony,

The software levels within these product is indeed quite old. With regard to the MFDs, there were more than 19 software updates alone, each adding new features, performance, and compatibility with other products, as well as feature corrections. Please note that should you ever have a problem(s) with the system, these older versions of software are not supported and you would be likely directed to update the software within them before further assistance could be rendered. The choice is essentially up to you to continue on with the system as you know it, or update the system and learn the LightHouse II software interface. Of the equipment listed, all would be compatible with a system of MFDs running LightHouse II v19.03 software. When updating the software within the MFDs, it is recommended that if the current software level is lower than v6.47 that the software be updated in three steps:
1) back up any waypoint, route, and track data of value to a microSD memory card
2) update the software within the system's MFDs to v6.27 w/cartography ... it is recommended that this software version be installed twice and that a System Settings & Data Reset be commanded following the update
3) update the software within the system's MFDs to v13.37 ... this step may be skipped if no waypoint, route, or track data was backed up in step 1)
4) import the backed up waypoint, route, or track data into the memory of the Data Master MFD ... this step may be skipped if no waypoint, route, or track data was backed up in step 1)
5) update the software within the system's MFDs to LightHouse II v19.03

Q1. I see in the 19.03 software update info. that updates will be included for the MFD's, converters, p70, and i70 components.
A1. Correct. If the i70's software level is v1.08, its boot code will need to be updated before its software may be updated. Likewise, if the p70's software level is v1.04, its boot code will need to be updated before its software may be updated.

Q2. It looks like the AIS unit can separately be updated to software v2.02 (040200_02_02_00).
A2. Correct

Q3. Not sure about the SR6 weather instrument, Digital Radome, or S2G course computer as they do not seem to have software updates listed.
A3. Neither are end user software updates are available for these products, nor would any update to these items be required to permit communications with a MFD running LHII v19.03 software.

Q4. Of most concern to me is the SmartPilot S2G and am wondering if I update to Lighthouse 19.03 (with all the related component software updates), will the S2G course computer still interface and operate properly with the whole system?
A4. No need to worry here. Just ensure that the SeaTalk to SeaTalkng Converter has been updated with the latest available software update.

Q5. Also, is it actually necessary to also update the AIS650, SR6, and Digital Radome as well or will they work with their existing software versions and Lighthouse 19.03?
A5. As indicated above there are no end user software updates are available for the SR6 and Digital Radome. It is recommended that the AIS650's software be updated. This is easily accomplished with a SD memory card.