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Service › Engine & equipment manuals › B&G Zeus 3 / 3S / S

B&G · Chartplotter

B&G Zeus 3 / 3S / S

The Zeus3, Zeus3S and Zeus S are B&G’s chartplotters for sailing yachts: built-in GPS, Wi-Fi and sonar, NMEA 2000 and Ethernet for B&G instruments and HALO radar, and sailing tools such as SailSteer, laylines, SailingTime, a start-line race panel and B&G autopilot control. The Zeus3 of late 2016 (7, 9, 12 and 16 in) pairs a touchscreen with a rotary knob and keypad and runs on 12 or 24 V; in 2020 the Zeus3S took over the 9, 12 and 16 in in the same housings with a faster processor, while the Zeus3 7 stayed on sale, and both share bezels, dash kits and brackets with Simrad’s NSS evo3. The Zeus S of January 2023 (7, 9 and 12 in) is a touch-only redesign on B&G’s NEON software with C-MAP DISCOVER X and REVEAL X charts, 12 V only and its own mounting parts, some of them shared with the Simrad NSX. The Zeus S Ultrawide, the Glass Helm versions, the Zeus SR and SRX and the older Zeus2 are separate products and not covered here.

  • Manuals & documents
  • Wear parts & part numbers
  • Service intervals
  • Specifications
  • Good to know
  • Videos & how-tos
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Manuals & documents

The links go to B&G’s own documents — some as archived copies of pages the maker has since taken down. We host no manuals or drawings.

  • Zeus3 installation manual 988-11387-001 (7, 9, 12 and 16 in: wiring, specifications, accessory part numbers) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES · IT · NL
  • Zeus3 operator manual 988-11377-001 (first edition, software 1.0) Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES · IT · NL
  • Zeus3 quick guide 988-11374-002 Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES
  • Zeus3 software 20.0 addendum 988-12650-002 (new features since the operator manual) Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Zeus series software 22.2 addenda, all languages (ZIP archive) Operation manual cxjdfr.files.cmp.optimizely.com · ZIP
  • Zeus series software 23.4 addendum Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Zeus3 software update 25.2 (71.1.22): one .upd file of about 218 MB, which B&G lists for every Zeus3 size (7, 9, 12 and 16 in) Software update cxjdfr.files.cmp.optimizely.com · UPD
  • Zeus3S installation manual 988-12599-002 (9, 12 and 16 in: wiring, specifications) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES · IT · NL
  • Zeus3S operator manual, edition 005 (software 25.2) Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES · IT · NL
  • Zeus3S quick start guide 988-12597-002 Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES
  • Zeus3S software update 25.2 (71.1.22, 6 August 2025): .upd file of about 271 MB, for the Zeus3S only Software update cxjdfr.files.cmp.optimizely.com · UPD
  • Zeus S installation manual 988-12624-003 (wiring, specifications; also covers the Ultrawide) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES · IT · NL
  • Zeus S quick start guide 988-13103-003 Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES
  • NEON System Guide, edition 003 for software 2.5 (Zeus S: operation, maintenance, updates) Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES
  • Zeus S chart app guide, edition 003 (charts, laylines, race mode) Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN · DE · FR · ES
  • Zeus S instruments app guide, edition 002 Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Zeus S autopilot controller guide, edition 002 Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Zeus S software update NEON 2.5.208 (10 September 2026): .upd file of about 1.34 GB Software update cxjdfr.files.cmp.optimizely.com · UPD
  • NEON 2.5 software release notes for the Zeus S (May 2026) Software update cxjdfr.files.cmp.optimizely.com · PDF · EN
  • How to update the software on a Vulcan or Zeus chartplotter (B&G help: microSD card and Wi-Fi) Software update bandg.com · EN
  • Mounting template 9 in, Zeus3 / Zeus3S and NSS evo3 / evo3S (988-11398-003) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Mounting template 12 in, Zeus3 / Zeus3S and NSS evo3 / evo3S (988-11399-003) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Mounting template 16 in, Zeus3 / Zeus3S and NSS evo3 / evo3S (988-11400-003) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Mounting template Zeus S 7 (988-13136-002) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Mounting template Zeus S 9 (988-13137-002) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN
  • Mounting template Zeus S 12 (988-13138-002) Installation guide cxjdfr.files.cmp.optimizely.com · PDF · EN
  • ForwardScan user guide 988-10761-002 Operation manual cxjdfr.files.cmp.optimizely.com · PDF · EN
  • B&G downloads: manuals in several languages, software and mounting templates (choose “Zeus3 7”, “Zeus3S”, “Zeus S”, or “Discontinued” for the Zeus3 9, 12 and 16) Manual portal bandg.com · EN
  • B&G downloads page for the Zeus S Manual portal bandg.com · EN
  • Zeus3S overview page, archived in August 2020 (launch features) Archived maker page web.archive.org · EN
  • Zeus3 7 product page (specifications, box contents, spares) Product page bandg.com · EN
  • Zeus3S 9 product page (specifications, box contents, spares) Product page bandg.com · EN
  • Zeus3S 12 product page Product page bandg.com · EN
  • Zeus3S 16 product page Product page bandg.com · EN
  • Zeus S 7 product page (specifications, box contents) Product page bandg.com · EN
  • Zeus S 9 product page Product page bandg.com · EN
  • Zeus S 12 product page Product page bandg.com · EN

Wear parts & part numbers

PartOEM numberAlso fitsNote
Sun cover000-13744-001 · 000-13745-001 · 000-13746-001 · 000-13747-0011,2,3,4,5,6,7,8,9—Zeus3 and Zeus3S: 000-13744-001 Zeus3 7, 000-13745-001 9 in, 000-13746-001 12 in, 000-13747-001 16 in. The 9, 12 and 16 in covers fit the Zeus3 and the Zeus3S of that size (B&G: “Zeus³/3S 9 Sun Cover”); one comes in the box. Not for the Zeus S.
Sun cover000-15819-001 · 000-15820-001 · 000-15821-00110,11,12,13,14—Zeus S only: 000-15819-001 Zeus S 7, 000-15820-001 Zeus S 9, 000-15821-001 Zeus S 12. One source: the numbers come from the box lists on B&G’s Zeus S pages, where the cover’s picture is filed under them; B&G has no separate page for these covers. The Simrad NSX covers (000-15816-001 to 000-15818-001) are different parts. Take the cover off before getting under way.
Bezel000-13749-001 · 000-13750-001 · 000-13751-001 · 000-13752-0011,15,16,17,18,19,7,8,9—Edge bezels, the snap-on top and bottom trim strips, for the Zeus3 and Zeus3S: 000-13749-001 Zeus3 7, 000-13750-001 9 in, 000-13751-001 12 in, 000-13752-001 16 in; shared with the Simrad NSS evo3 and evo3S of the same size. The 9, 12 and 16 in sets come in the box. The Zeus S has corner clips instead.
Fastening kit000-13753-001 · 000-13754-001 · 000-13755-001 · 000-13756-0011,6,20,21,22,23,24,9—Dash (panel) mount kit for the Zeus3 and Zeus3S: 000-13753-001 Zeus3 7, 000-13754-001 9 in, 000-13755-001 12 in, 000-13756-001 16 in; shared with the Simrad NSS evo3 and evo3S. B&G lists the 7 in kit in the box of the Zeus3 7.
Fastening kit000-15823-001 · 000-15824-001 · 000-15825-00125,10,26,12,27,13—Dashboard mounting kit for the Zeus S: 000-15823-001 Zeus S 7, 000-15824-001 Zeus S 9, 000-15825-001 Zeus S 12; one comes in the box. The same kits serve the Simrad NSX 3007, 3009 and 3012 (see our Simrad NSX page), the 9 and 12 in kits also the Vulcan2.
Mounting bracket000-13757-001 · 000-13702-0011,28,29,6—Zeus3 7 only (there is no Zeus3S 7). The 2016 installation manual lists the U-bracket 000-13757-001 (“NSS7 EVO3 & ZEUS3 - 7 MOUNTING BRACKET”); B&G’s current Zeus3 7 page ships the gimbal bracket 000-13702-001 instead (“Gimbal Bracket, NSS7 evo3, GO9, Cruise 9, Vulcan 9, Zeus³ 7”). B&G does not say that one replaced the other, so compare with the bracket on the boat before ordering.
Mounting bracket000-13758-001 · 000-13759-001 · 000-13760-0011,30,31,32,7,8,9—Zeus3 and Zeus3S: 000-13758-001 gimbal bracket 9 in (also NSS9 evo3 / evo3S and Cruise 9), 000-13759-001 bracket 12 in, 000-13760-001 bracket 16 in. In the box, except on the Zeus3S 16, which ships without a bracket, so 000-13760-001 is bought separately.
Mounting bracket000-12372-001 · 000-13702-001 · 000-14148-00133,10,11,28,12,34,13—Zeus S, one in the box: 000-12372-001 Zeus S 7 (B&G: “B&G Zeus S Bracket”, the same U-bracket as the GO7 and Vulcan 7), 000-13702-001 Zeus S 9 (plastic gimbal bracket, also on today’s Zeus3 7), 000-14148-001 Zeus S 12 (metal; B&G: “GO12 / Vulcan 12 Bracket Accessory”).
Adjusting knob000-10467-00135,6,36—Pair of bracket knobs (B&G: “Bracket Knobs for NSS evo2/Zeus2/HDS gen2T”), listed in the box of the Zeus3 7 on B&G’s US and UK pages.
Adjusting knob000-14317-00137,7,9—Rotary knob on the front of the Zeus3 and Zeus3S (B&G: “Replacement rotary knob for B&G Zeus³ MFDs”; shared with the NSS evo3 and Cruise). The Zeus S has no knob.
Card door000-13748-0011,38,39—Door of the microSD card reader (not the reader itself) for the Zeus3 and Zeus3S, also the NSS evo3. Keep it shut and free of salt: a leaking door lets water into the card slot.
Power cable000-00128-00140,41,7,11—4-pin power cable for every Zeus3, Zeus3S and Zeus S: red +, black −, yellow power control, blue alarm output. In the box of the Zeus3S and the Zeus S. Fit the fuse given under the specifications; the Zeus S is 12 V only.
Cable000-00129-0011,42,6—Video / NMEA 0183 cable for the VIDEO socket of the Zeus3 and Zeus3S: two RCA camera inputs plus the NMEA 0183 transmit and receive wires. Not in the box. The Zeus S has no such socket.
Cable000-13313-00143,1,7—7-pin to 9-pin transducer adapter: an older transducer with a blue 7-pin plug then works on the 9-pin xSonic sonar sockets of the Zeus3, Zeus3S and Zeus S, but its paddle-wheel speed is not shown. One source, fits by connector: Simrad’s adapter page describes the plugs, and the Zeus manuals mention the adapter without a number.
Network connector (T-piece, terminator)000-0119-75 · 000-0119-7944,45,7,9—NMEA 2000 Micro-C parts that B&G links from its Zeus3S 9 and 16 pages: 000-0119-75 power node N2K-PWR-RD (power cable with T-connector, feeds the backbone), 000-0119-79 T-connector N2K-T-RD. Standard Micro-C, so they suit the Zeus3 and the Zeus S as well.
Network cable000-0127-5346,7,9,42—NMEA 2000 Micro-C extension cable, 1.8 m (6 ft), linked from B&G’s Zeus3S 9 and 16 pages; it fits the Micro-C socket of all three generations. Drop cables may be at most 6 m long.
Network cable000-0119-88 · 000-0119-86 · 000-0119-83 · 000-10996-001 · 000-12202-00147,48,49,50,51,42—More B&G Micro-C backbone parts: extension cables 2 ft 000-0119-88, 15 ft 000-0119-86 and 25 ft 000-0119-83, 4-way joiner 000-10996-001, power cable without T-connector 000-12202-001. One source each, fits by connector: B&G’s pages for these parts name no display, they fit by the Micro-C socket the manuals give.
Network cable000-0127-3752,53,54—Yellow 5-pin Ethernet cable, 15.2 m (50 ft), linked from B&G’s Zeus S 9 and 12 pages; it fits the Ethernet socket of all three generations, for radar, sonar modules or a second display.
Network cable000-0127-51 · 000-0127-29 · 000-0127-30 · 000-10779-001 · 000-10438-001 · 000-0127-5655,56,57,58,59,60,1—More yellow 5-pin Ethernet parts: cables 6 ft 000-0127-51, 15 ft 000-0127-29 and 25 ft 000-0127-30, female-to-female joiner 000-10779-001, adapter RJ45 male to 5-pin female 000-10438-001, cable 5-pin male to RJ45 female (2 m) 000-0127-56. One source each, fits by connector: B&G’s pages for these parts name no display.
Card reader000-13892-00161,42,62—MI10 dual microSD card reader with USB. The Zeus3S installation manual says reading chart cards over USB (16 in only) needs an MI10, and B&G’s NEON 2.5 release notes mention it for Zeus S updates. One source: B&G’s MI10 page itself names only the Zeus2 Glass Helm and the NSO evo2.
Transducer000-11674-00163,1,42—ForwardScan transducer kit (transducer, sleeve, blanking plug, fairing block) for the Zeus3 and Zeus3S: it plugs straight into Sonar 2 (black nut); B&G says it connects directly to Vulcan and Zeus3. Not listed for the Zeus S.
Transducer000-13284-00164—ForwardScan long-stem transducer kit with sleeve and plug, for thick or steeply inclined hulls; B&G says it connects to the Zeus3 and the Vulcan via the StructureScan socket.
Transducer000-11675-00165—ForwardScan transducer without sleeve, for a boat that already has the ForwardScan sleeve fitted; B&G: connects directly to the Zeus3 and selected Vulcan models.
Through-hull housing (transducer)000-11669-001 · 000-12230-001 · 000-12231-001 · 000-12232-00166,67,68,69,63—ForwardScan spares: 000-11669-001 sleeve and plug without transducer, 000-12230-001 blanking plug (seals the sleeve while the transducer is out), 000-12231-001 fairing block, 000-12232-001 O-ring kit.
Transducer000-15735-00170—DST810 depth, speed and temperature smart sensor, plastic thru-hull. It is an NMEA 2000 sensor, not for the sonar socket, so it works with all three generations (B&G: “easily connects with Zeus and Vulcan systems”).
Corner clips000-15822-00171,11,12—Corner clips for the Zeus S 7, 9 and 12: the front trim pieces that hide the panel-mount screws; one set fits all three sizes and the Simrad NSX 3007, 3009 and 3012 (see our Simrad NSX page). B&G lists them in the box of the Zeus S. Not used on the Ultrawide models.

Numbers checked against the sources below on 13 October 2026. Always confirm against your serial number and exact type before ordering.

Service intervals

TaskInterval
Software updateNo fixed interval. Zeus3 and Zeus3S check online for updates from the system settings; the Zeus S downloads updates by itself over Wi-Fi or through the B&G app. Otherwise copy the file to a memory card that is not a chart card. Back up first and do not switch off until the unit restarts. The Zeus3 and the Zeus3S have separate files (both v25.2), the Zeus S runs NEON v2.5.20872,73,74,75
Data backupRegularly, and always before an update or a reset: export waypoints, routes, tracks and settings to a memory card, never to a chart card. Zeus3 / Zeus3S: User Data File version 5 or 4, or GPX, plus the settings database · Zeus S: .USR (version 6), .GPX or .NEON76,77
Fresh-water washAfter use: fit the sun cover (on the Zeus S take it off again before getting under way), rinse salt off with fresh water and wipe dry with a soft cloth without pressing. No solvents, ammonia or pressure washer; the Zeus S guide also rules out alcohol77,76,14
Electrical connectionsPeriodically (B&G gives no hours or months): push every plug fully home and lock its collar, free any key that sticks and clean salt off the card-reader door so it seals (Zeus3 / Zeus3S manual)76

From B&G’s Zeus3 operator manual 988-11377-001, the NEON System Guide (edition 003) for the Zeus S and B&G’s help page on software updates. B&G sets no maintenance schedule in hours or months for these displays.

Specifications

ModelsZeus3 (written Zeus³): 7, 9, 12 and 16 in; display-only units 000-13241-001 (7 in, US with C-MAP) and 000-13245-001 (7 in, world basemap), 000-13242-001 (9 in), 000-13243-001 (12 in), 000-13244-001 (16 in) · Zeus3S: 9, 12 and 16 in only; 000-15408-001 / 000-15411-001 (9 in, US / world basemap), 000-15409-002 / 000-15412-002 (12 in), 000-15410-001 / 000-15413-001 (16 in) · Zeus S: 7, 9 and 12 in; 000-15216-001 / 000-15217-001 (7 in, US with C-MAP DISCOVER X / global basemap), 000-15220-001 / 000-15221-001 (9 in), 000-15224-001 / 000-15225-001 (12 in) · There is no Zeus3S 7: B&G kept the Zeus3 7 as the small screen of the range6,36,78,23,79,7,39,8,9,10,11,53,12,54,13
VersionsZeus3S: faster quad-core processor in the same housings, with the same keypad, rotary knob, card reader and sockets as the Zeus3 of that size; HDMI out only on the 16 in (Zeus3: 12 and 16 in) · Zeus S: touch-only with a single power key, B&G’s NEON software, 12 V only, one sonar socket, one microSD slot, no NMEA 0183 and no video input, C-MAP DISCOVER X / REVEAL X charts only, and its own sun covers, dash kits, corner clips and brackets6,42,14,7
Years builtZeus3: shown in November 2016 (B&G’s launch video of 18 November 2016; manuals dated 2016); the 9, 12 and 16 in were replaced in 2020, the Zeus3 7 is still sold in 2026 · Zeus3S: from 2020 (B&G’s Zeus3S page was first archived in August 2020) · Zeus S: launched on 19 January 202380,1,81,82,6
TypeSailing multifunction display: chartplotter with built-in GPS, Wi-Fi and sonar, NMEA 2000 and Ethernet for B&G instruments, autopilots and HALO radar. Zeus3 / Zeus3S: SailSteer panel and chart overlay, laylines from the boat and from the mark with tidal-flow correction, SailingTime, RacePanel with the start line on the chart, wind and time plots, PredictWind weather routing, full B&G autopilot control including wind steering · Zeus S: Sailing Modes with cruising and racing dashboards, SailSteer, laylines, StartLine and race mode with race routes and timer, C-MAP Safety Alerts; B&G notes that screen mirroring and control from a phone are not available on the Zeus S76,53
DisplayZeus3 / Zeus3S: 7 (Zeus3 only), 9, 12 and 16 in SolarMAX HD IPS, optically bonded, 1200 nits, multi-touch, 80° viewing angle · Zeus S: 7, 9 and 12 in IPS multi-touch, over 1000 nits typical (B&G’s product pages: 1200 nits), 85° viewing angle; touchscreen and a single power key, no keypad or knob1,14,10
Resolution7 in 1024 × 600, 9 in 1280 × 720, 12 in 1280 × 800, 16 in 1920 × 1080 on the Zeus3 and Zeus3S; the Zeus S has the same figures for its 7, 9 and 12 in (B&G’s Zeus S 9 page gives 1280 × 800, the installation manual 1280 × 720)1,42,14,53
VoltageZeus3 / Zeus3S: 12 or 24 V DC (10–31.2 V), protected against reverse polarity and short over- and under-voltage · Zeus S: 12 V DC only (10–17 V), with reverse-polarity protection and over-voltage protection up to 18 V1,42,14
Power consumptionZeus3 / Zeus3S, maximum: 7 in 20 W ±4 W, 9 in 23 W ±4 W, 12 in 30 W ±5 W, 16 in 45 W ±5 W (B&G’s Zeus3S pages: 21, 28 and 40 W) · Zeus S, maximum: 7 in 11.5 W (0.83 A at 13.8 V), 9 in 18.8 W (1.36 A), 12 in 26.2 W (1.90 A) (B&G’s Zeus S 9 page: 29.7 W)1,42,14,7,8,9,53
Breaker / fuseZeus3: 3 A for the 7 and 9 in, 5 A for the 12 and 16 in · Zeus3S: 5 A for every size per the installation manual (B&G’s Zeus3S 16 page: 7.5 A) · Zeus S: 3 A (B&G’s Zeus S 7 page: 2 A) · NMEA 2000 backbone: its own fused 12 V feed, 3 A per the Zeus3S and Zeus S manuals (Zeus3 manual: 5 A)1,42,14,9,10
TransducersZeus3 / Zeus3S: two 9-pin sonar sockets. Sonar 1 (blue nut): single-channel CHIRP, 50/200 kHz or HDI. Sonar 2 (black nut): CHIRP, 50/200 kHz, TotalScan, StructureScan (HD) or ForwardScan (B&G’s Zeus3 7 page adds Active Imaging); 40–250 kHz and 455–800 kHz, 1 kW RMS. The Zeus3S also works with SonarHub, BSM-2/3 and network sounders · Zeus S: one 9-pin socket for CHIRP, DownScan, SideScan, Active Imaging (the manual names HD and 3-in-1 too), TotalScan and StructureScan transducers; ForwardScan is not listed1,6,7,14
Data connectionsNMEA 2000: one Micro-C socket (1 LEN) on every model; the backbone needs a terminator at each end, and drop cables may be at most 6 m long · Ethernet (yellow 5-pin) for radar, sonar modules and display sharing: one socket on the 7 and 9 in, two on the 12 and 16 in Zeus3 / Zeus3S; one on every Zeus S (also for IP cameras) · NMEA 0183: one talker/listener port, 4800 to 38400 baud, on the Zeus3 / Zeus3S only, through the optional cable 000-00129-001; the Zeus S has none42,1,14
PortsZeus3 / Zeus3S: 4-pin power (red +, black −, yellow power control, blue alarm), Micro-C NMEA 2000, two 9-pin sonar sockets, Ethernet, and a combined VIDEO socket with two composite camera inputs and NMEA 0183 (cable 000-00129-001); HDMI out on the Zeus3 12 and 16 in but only on the Zeus3S 16 in; USB-A (keyboard, mouse, storage; 5 V, 1.5 A) on the 16 in only · Zeus S: 4-pin power / power control / alarm, Micro-C NMEA 2000, one 9-pin sonar socket, one Ethernet socket, USB-A (5 V, 1.5 A) on the 9 and 12 in, and an earth-ground stud; no NMEA 0183 and no analogue video input42,1,40,14
Data connectionsInternal 10 Hz GNSS: Zeus3S GPS and GLONASS plus Galileo, BeiDou and QZSS, with SBAS; the Zeus3 and the Zeus S have 10 Hz GPS · Wi-Fi (b/g/n) on all three; Bluetooth v4.0 on the Zeus3S, Bluetooth also on the Zeus342,14
Processor & memoryZeus3 / Zeus3S: two microSD slots behind a door for charts (C-MAP, Navionics and other AT5 charts; Insight and Genesis on early units), software updates, user data and backups; B&G’s product pages give 16 GB internal memory and at most 32 GB per card, larger if NTFS-formatted. The Zeus3S has a faster quad-core processor · Zeus S: one microSD slot (up to 256 GB, FAT32, exFAT or NTFS) for C-MAP DISCOVER X and REVEAL X, which can also be bought as a licence in the X-Chart Manager app and stored internally; the 9 and 12 in also read a USB stick or card reader1,7,6,77
Waterproof ratingIPX6 and IPX7 on all three generations42
Operating temperature−15 to +55 °C (storage −20 to +60 °C)42
MountingZeus3 / Zeus3S: supplied U-bracket with knobs, or panel mounting with the self-adhesive foam gasket, the mounting template and snap-on two-piece edge bezels; the Zeus3S 16 ships without a bracket (the Zeus3 16 had one); compass safe distance 50 cm · Zeus S: plastic bracket (7 and 9 in) or metal bracket (12 in) with knobs, supplied, or panel mounting with the dash gasket and corner clips; compass safe distance 65 cm per the installation manual (B&G’s product pages: 50 cm)42,9,14,10
DimensionsZeus3 / Zeus3S, W × H × D, display only / with bracket: 7 in (Zeus3 only) 239 × 150 × 90 / 263 × 161 × 93 mm; 9 in 287 × 166 × 90 / 311 × 180 × 95 mm; 12 in 352 × 225 × 98 / 377 × 241 × 120 mm; 16 in 437 × 256 × 98 / 462 × 264 × 122 mm · Zeus S, display: 7 in 195 × 123 × 72 mm, 9 in 239 × 149 × 73 mm, 12 in 310 × 208 × 78 mm6,10,14
WeightDisplay only: Zeus3 / Zeus3S 7 in 1.1 kg, 9 in 1.41 kg, 12 in 3.1 kg, 16 in 4.65 kg (Zeus3S manual: 1.4, 3.1 and 4.7 kg) · Zeus S 7 in 0.8 kg, 9 in 1.2 kg, 12 in 2.2 kg per the installation manual (B&G’s Zeus S 9 page: 2.2 kg)1,42,14,53
SoftwareZeus3: v25.2 (71.1.22), one 218 MB .upd file that B&G lists for every Zeus3 size · Zeus3S: v25.2 (71.1.22) of 6 August 2025, its own 271 MB file · Zeus S: NEON v2.5.208 of 10 September 2026, a 1.34 GB file; earlier releases on the portal include v1.6, v2.1.542 and v2.3.196. The full Zeus3 operator manual is still the 2016 edition for software v1.0; later features are in the addenda for v20.0, v22.2 and v23.473,74,75,83,84,85,86

Good to know

  • Tell the generations apart before you buy parts. Zeus3 (2016) and Zeus3S (2020) look alike, with a rotary knob and keypad, and share sun covers, edge bezels, dash kits and brackets size for size; there is no Zeus3S 7. The Zeus S (2023) is touch-only with a single power key and has its own sun covers, dash kits and corner clips with 000-158xx numbers; the dash kits and corner clips are shared with the Simrad NSX, which has its own page here.7,14,25,71
  • On a 24 V boat the Zeus3 and Zeus3S run directly on 12 or 24 V (10–31.2 V), but the Zeus S is 12 V only (10–17 V): a Zeus S that replaces a Zeus3 there needs a DC-DC converter. The NMEA 2000 backbone always needs its own 12 V feed.14,1,42
  • Charts do not carry over between generations. The Zeus S reads only C-MAP DISCOVER X and REVEAL X, which C-MAP sells for NEON displays, while the Zeus3 and Zeus3S use the earlier C-MAP cards and Navionics: a chart card from a Zeus3 or Zeus3S will not work in a Zeus S. Chart card numbers depend on the region, which is why none are listed here: go by the card’s label and region. Never copy updates or backups to a chart card; use a separate microSD.87,77,1
  • ForwardScan plugs straight into Sonar 2 (black nut) of a Zeus3 or Zeus3S; the Zeus S installation manual does not list it. Keep the blanking plug 000-12230-001 and a spare O-ring kit 000-12232-001 on board so you can pull the transducer and seal the sleeve.63,67,69,14
  • Wiring: leave the yellow wire unconnected to switch on with the power key, join it to red after the fuse to start as soon as there is power, or take it to the ignition. The Zeus3 and Zeus3S also have a VIDEO socket for NMEA 0183 and two cameras through cable 000-00129-001, which the Zeus S lacks. The Zeus3S 16 ships without a bracket (000-13760-001).42
  • Zeus S updates are over 1 GB: use a strong Wi-Fi link or the B&G app, or copy the .upd file to the root of a microSD card; on a Mac, stop Safari from unpacking the file. If the boat shows up off the coast of Africa after the update, set Settings > Boat network > Sources > Auto select all sources, then switch the whole system off and on again.62

Videos & how-tos

Links to YouTube, nothing embedded. The maker’s own channel comes first; the rest are channels we found clear and correct for this model.

  • B&G Zeus3 walkthrough: the main features Video B&G Sailing · maker’s channel · EN · 4 min
  • Backing up waypoints, routes and tracks on a Zeus3S (B&G Tech Tip) Video B&G Sailing · maker’s channel · EN · 2 min
  • Software update for a B&G Zeus3 display Video Everything Yacht · EN · 3 min
  • B&G Zeus S and Zeus SR: race mode Video B&G Sailing Help · EN · 3 min

Fitted in

Boats whose builder lists it as standard or optional equipment:

  • Lagoon 42 — B&G Zeus3 12″ (Option at the chart table and/or the helm, configurator 2019, 2020 and 2022; no plotter as standard (the chart table has a panel ready for electronics))
  • Lagoon 46 — B&G Zeus3 16″ · Zeus3 12″ (Options in the March 2019 and June 2020 configurators: Zeus3 16″ at the helm (2020: ‘with pod’) and Zeus3 12″ at the chart table (2020: on a leather-covered pod))
  • Seawind 1160 — B&G Zeus3 12″ (option) (No plotter in any standard list. Seawind’s recommended options of 2019 included an upgrade to the 12-inch Zeus3 and B&G ForwardScan, and its 2018 Spec Talk video shows a Lite leaving the factory with a Zeus3; the 2009 charter pack had a Raymarine C80, the 2014 test Lite an e7)
  • Bavaria C42 — B&G Zeus³ 7" · Zeus³S 9" (Navigation Advanced (Zeus³ 7 in) or Premium (Zeus³S 9 in) package, at the cockpit table, with GoFree Wi-Fi; a second Zeus³S 9 in at the chart table as an upgrade)
  • Beneteau Oceanis 40.1 — B&G Zeus 7″ · Zeus3 12″ (B&G packs (lists of 2020 to February 2022): Zeus 7″ wide at the starboard helm, a second one at the port helm in the Offshore pack; Zeus3 12″ wide at the chart table as an option)
  • Beneteau Oceanis 46.1 — B&G Zeus 7″ · Zeus 9″ (July 2018 list, option packs: Zeus 7″ wide wireless at the starboard console (Coastal), a second one to port (Offshore); Zeus 9″ wide wireless at the chart table as an option)
  • Dehler 38 — B&G Zeus³ 7" (Option, B&G Navigation Package – Cruising (configurators of October 2019 and August 2020): Zeus³ 7 in at the starboard helm, a second one at the port helm as an upgrade · a 2013 test boat had a B&G Zeus Touch 8 (Badmagasinet 10/2013))
  • Hanse 418 — B&G Zeus³S 9" · 12" (Option: B&G Navigation Package with a Zeus³S 9 in at the cockpit table, upgrade to the Zeus³S 12 in (configurator of August 2020, brochure F/0920))

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Sources

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