diff --git a/templates/adsb_dashboard.html b/templates/adsb_dashboard.html
index 7f0ae52..e41980f 100644
--- a/templates/adsb_dashboard.html
+++ b/templates/adsb_dashboard.html
@@ -108,12 +108,15 @@
                                     <option value="0">SDR 0</option>
                                     <option value="1">SDR 1</option>
                                 </select>
-                                <select id="acarsRegionSelect" onchange="setAcarsFreqs()" style="flex: 1; font-size: 10px;">
+                                <select id="acarsRegionSelect" onchange="updateAcarsFreqCheckboxes()" style="flex: 1; font-size: 10px;">
                                     <option value="na">N. America</option>
                                     <option value="eu">Europe</option>
                                     <option value="ap">Asia-Pac</option>
                                 </select>
                             </div>
+                            <div id="acarsFreqSelector" style="display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; font-size: 9px;">
+                                <!-- Frequency checkboxes populated by JS -->
+                            </div>
                             <button class="acars-btn" id="acarsToggleBtn" onclick="toggleAcars()" style="width: 100%;">
                                 ▶ START ACARS
                             </button>
@@ -3252,21 +3255,49 @@ sudo make install</code>
             localStorage.setItem('acarsSidebarCollapsed', acarsSidebarCollapsed);
         }
 
-        // Initialize ACARS sidebar state
+        // Initialize ACARS sidebar state and frequency checkboxes
         document.addEventListener('DOMContentLoaded', () => {
             const sidebar = document.getElementById('acarsSidebar');
             if (sidebar && acarsSidebarCollapsed) {
                 sidebar.classList.add('collapsed');
             }
+            updateAcarsFreqCheckboxes();
         });
 
-        function setAcarsFreqs() {
-            // Just updates the region selection - frequencies are sent on start
+        function updateAcarsFreqCheckboxes() {
+            const region = document.getElementById('acarsRegionSelect').value;
+            const freqs = acarsFrequencies[region] || acarsFrequencies['na'];
+            const container = document.getElementById('acarsFreqSelector');
+
+            // Save currently checked frequencies
+            const previouslyChecked = new Set();
+            container.querySelectorAll('input:checked').forEach(cb => {
+                previouslyChecked.add(cb.value);
+            });
+
+            container.innerHTML = freqs.map(freq => {
+                // Check by default if it was previously checked or if this is initial load
+                const checked = previouslyChecked.size === 0 || previouslyChecked.has(freq) ? 'checked' : '';
+                return `
+                    <label style="display: flex; align-items: center; gap: 3px; padding: 2px 6px; background: var(--bg-secondary); border-radius: 3px; cursor: pointer;">
+                        <input type="checkbox" class="acars-freq-cb" value="${freq}" ${checked} style="margin: 0; cursor: pointer;">
+                        <span>${freq}</span>
+                    </label>
+                `;
+            }).join('');
         }
 
         function getAcarsRegionFreqs() {
-            const region = document.getElementById('acarsRegionSelect').value;
-            return acarsFrequencies[region] || acarsFrequencies['na'];
+            const checkboxes = document.querySelectorAll('.acars-freq-cb:checked');
+            const selectedFreqs = Array.from(checkboxes).map(cb => cb.value);
+
+            // If none selected, return all for the region as fallback
+            if (selectedFreqs.length === 0) {
+                const region = document.getElementById('acarsRegionSelect').value;
+                return acarsFrequencies[region] || acarsFrequencies['na'];
+            }
+
+            return selectedFreqs;
         }
 
         function toggleAcars() {