Accessibility

theONE Vessel Command Center · JEMS Marine, LLC · Last checked October 2026

This page says what theONE’s iPhone app and this website do today for people who use VoiceOver, a larger text size, Reduce Motion or Increase Contrast; where they still fall short; and how to tell us when something gets in your way. It describes theONE as it is built now, not as we hope it will be.

What we aim for

We aim for the Web Content Accessibility Guidelines (WCAG) 2.2 at Level AA on this website, and we hold the app to the same contrast ratios. Neither the site nor the app has been independently audited, and we do not claim conformance with any level of WCAG. What follows is what we have checked ourselves.

In the app

• VoiceOver. Controls carry spoken names. A gauge on Mission Control says what it is and what it reads — “Depth, 8.5 feet” — with units spoken as words, and a gauge with nothing to report says “no reading” rather than reading out a dash.
• Spoken without being asked. With VoiceOver on, theONE announces a man-overboard pin (captured, with its position, or failed), the anchor dragging and a new AIS alarm the moment they happen, at high priority so other speech does not drown them out. Messages that appear briefly on screen, such as a confirmation or an undo banner, are spoken too.
• Gestures have another way in. Actions on a list row that you would otherwise reach by swiping are offered as VoiceOver actions: swipe up or down on the row to hear them.
• Text size. theONE’s text follows the text size you set for your iPhone (Settings → Display & Brightness → Text Size, or Accessibility → Display & Text Size → Larger Text). At the larger accessibility sizes, a row whose pieces sit side by side puts one under the other, and a title or name held to one or two lines at your usual size is shown in full.
• Reduce Motion. With Reduce Motion on, theONE’s own animations are switched off: a panel opening, a banner arriving or a figure changing lands at once instead of sliding or easing in.
• Increase Contrast. theONE follows the iOS Increase Contrast setting. With it on, the app’s text, link and status colours move a step darker in Light and a step lighter in Dark, to at least 7:1 against the app’s backgrounds, and card borders are drawn firmer; the hues, the backgrounds and the brand teal stay the same. At the standard setting, the app’s text and status colours are checked by automated tests against its own backgrounds, in Light and in Dark.
• Light, Dark or follow iOS. Menu (☰) → Settings → Preferences.
• Not colour alone. Shallow water on a route you draw is shown in red and also as a wider, dashed line, with a warning triangle on the waypoint, and VoiceOver names the shallow-water caution.

Where the app falls short

• VoiceOver on a device. Automated tests check that the spoken names and announcements are there, but they cannot listen with VoiceOver, and not every screen has yet been walked through with VoiceOver on an iPhone. Expect rough edges, and please tell us about them.
• The largest text sizes. theONE stops growing at the third of the five larger accessibility sizes, so two-column panels still fit. The live instruments — Mission Control’s tiles, the Captain’s Console and the chart’s chips and overlays — stop two steps past the usual size, so a depth figure does not wrap; the sheets and lists you open from them follow your size further. Text in the bar across the top of a screen stops at the largest standard size. Icons, and the initials in round badges, keep a fixed size.
• Increase Contrast does not change the colours that mark severity or departments, or the colours of charts and maps.
• Haptics confirm key actions, such as a man-overboard pin. There is no switch in theONE to turn them off.
• The home-screen widget “My Glance” does not yet have spoken labels of its own; VoiceOver reads each tile’s text as it appears, abbreviations included.
• We have not tested theONE with Voice Control, Switch Control or other assistive technology, and make no claims about them.

This website

We check every page with the automated axe-core tool and by hand — keyboard, landmarks, headings, text alternatives and contrast — at phone and desktop widths.

• Every page starts with a Skip to content link, the first thing the keyboard reaches, and is built on header, navigation, main and footer landmarks, with one main heading and no skipped heading levels.
• Images carry text alternatives; purely decorative ones are hidden from screen readers.
• The Features menu opens and closes from the keyboard, and Escape closes it. Keyboard focus shows with your browser’s own focus ring.
• Text meets a contrast ratio of at least 4.5:1 against its background (3:1 for large headings), including over the shaded bands on the home page.
• Pages reflow to a phone’s width without sideways scrolling.
• The moving starfield behind the pages stands still when your device asks for reduced motion.
• The site has a dark theme only.

Known problems on the site, which we are fixing:

• In the footer of every page, the “JEMS Marine, LLC” link is set apart from the text around it by colour alone, with no underline.
• The menu at the top of each page and the links at the foot of it are both navigation regions without names of their own, so a screen reader announces two identical “navigation” landmarks.

Tell us about a barrier

If something in theONE or on this site gets in your way, email ops@jems-marine.com. A person reads every message. Tell us what you were trying to do, which device you were using, which accessibility settings you have on (VoiceOver, a larger text size, Reduce Motion, Increase Contrast, or anything else), and what happened. From inside the app, Menu (☰) → Settings → Send Feedback writes to feedback@theonevcc.com; the report it prepares includes your text size setting, and the screen shows you exactly what will go before you send it.