diff --git a/band-plan-de.yml b/band-plan-de.yml
new file mode 100644
index 0000000..0c5d8a3
--- /dev/null
+++ b/band-plan-de.yml
@@ -0,0 +1,52 @@
+- start: 135.7
+  end: 137.8
+  power_a: 1 W ERP
+- start: 472
+  end: 479
+  power_a: 1 W ERP
+- start: 1810
+  end: 1850
+  power_a: 750 W PEP
+  power_e: 100 W PEP
+- start: 1850
+  end: 1890
+  power_a: 75 W PEP
+  power_e: 75 W PEP
+- start: 1890
+  end: 2000
+  power_a: 10 W PEP
+  power_e: 10 W PEP
+- start: 3500
+  end: 3800
+  power_a: 750 W PEP
+  power_e: 100 W PEP
+- start: 5351.5
+  end: 5366.5
+  power_a: 15 W EIRP
+- start: 7000
+  end: 7100
+  power_a: 750 W PEP
+- start: 7100
+  end: 7200
+  power_a: 750 W PEP
+- start: 10100
+  end: 10150
+  power_a: 150 W PEP
+- start: 14000
+  end: 14350
+  power_a: 750 W PEP
+- start: 18068
+  end: 18168
+  power_a: 750 W PEP
+- start: 21000
+  end: 21450
+  power_a: 750 W PEP
+  power_e: 100 W PEP
+- start: 24890
+  end: 24990
+  power_a: 750 W PEP
+- start: 28000
+  end: 29700
+  power_a: 750 W PEP
+  power_e: 100 W PEP
+  power_n: 10 W ERP
diff --git a/band-plan.html b/band-plan.html
index 115cc5e..856844f 100644
--- a/band-plan.html
+++ b/band-plan.html
@@ -37,7 +37,7 @@ div#togglebuttons>button {
 		document.addEventListener('DOMContentLoaded', () => {
 			update_plan();
 
-			document.getElementById("sel_plan").addEventListener("keydown", (event) => {
+			document.getElementById("base_plan").addEventListener("keydown", (event) => {
 				if (event.key === 'Enter') {
 					update_plan()
 				}
@@ -72,85 +72,168 @@ div#togglebuttons>button {
 			document.getElementById("error").innerText = e;
 		}
 
-		function update_plan() {
-			fetch(document.getElementById('sel_plan').value, {
-				mode: 'cors'
-			}).then((response) => {
-				if (!response.ok) {
-					throw new Error(response.status);
-				}
-				return response.text();
-			}).then((data) => {
-				try {
-					const bands = yaml.load(data);
-					var tdata = [];
-					bands.forEach((band) => {
-						band.parts.forEach((part) => {
-							tdata.push({
-								"band": band.band,
-								"mode": band.mode,
-								//"band_start": band.start,
-								//"band_end": band.end,
-								"bandwidth": band.bandwidth,
-								"description": part.description,
-								"frequency": typeof part.at !== "undefined" ? part.at : part.start + '\u2013' + part.end ,
-							});
-						});
-					});
+		function isInRange(number, min, max) {
+			return number >= min && number <= max;
+		}
 
-					// require in tabular-tables
-					// eslint-disable-next-line no-undef
-					var table = new Tabulator("#data-table", {
-						layout: "fitDataTable",
-						initialSort: [
-							{column: "frequency", dir: "asc"},
-							{column: "band", dir: "desc"},
-						],
-						selectableRows: true,
-						data: tdata,
-						columns: [
-							// eslint-disable-next-line no-unused-vars
-							{title: "band", field: "band", headerFilter: "input", sorter: function(a, b, aRow, bRow, column, dir, sorterParams){
-								return parseFloat(new Measures().from(a).to('m')) - parseFloat(new Measures().from(b).to('m'));
-							}},
-							{title: "frequency/kHz", field: "frequency", sorter: "number", headerFilter: "input", headerFilterFunc: filter_with_not},
-							{title: "bandwidth/Hz", field: "bandwidth", headerFilter: "input", headerFilterFunc: filter_with_not},
-							{title: "mode", field: "mode", headerFilter: "input", headerFilterFunc: filter_with_not},
-							//{title: "band_start", field: "band_start", headerFilter: "input"},
-							//{title: "band_end", field: "band_end", headerFilter: "input"},
-							{title: "description", field: "description", headerFilter: "input", headerFilterFunc: filter_with_not},
-						],
-					});
+		function add_power(add, p) {
+			if (typeof add.power_a !== "undefined") {
+				p["power_a"] = add.power_a;
+			}
+			if (typeof add.power_e !== "undefined") {
+				p["power_e"] = add.power_e;
+			}
+			if (typeof add.power_n !== "undefined") {
+				p["power_n"] = add.power_n;
+			}
+		}
 
-					document.getElementById("download").addEventListener("click", () => {
-						let download_range = "all";
-						if (table.getSelectedRows().length > 0) {
-							download_range = "selected";
+		function debug_tdata(s, tdata) {
+			if (tdata.length > 0) {
+				console.log(s + " " + tdata.length + " " + tdata[tdata.length - 1].frequency + " " + tdata[tdata.length - 1].power_a);
+				//console.log(s + " " + tdata.length);
+				//tdata.forEach((t) => {
+				//	console.log(s + " " + t.frequency);
+				//});
+			}
+		}
+
+		function update_table(bands, additions) {
+			var tdata = [];
+			bands.forEach((band) => {
+				band.parts.forEach((part) => {
+					let p = {
+						"band": band.band,
+						"mode": band.mode,
+						//"band_start": band.start,
+						//"band_end": band.end,
+						"bandwidth": band.bandwidth,
+						"description": part.description,
+						"frequency": typeof part.at !== "undefined" ? part.at : part.start + '\u2013' + part.end,
+						//"at": part.at,
+						//"start": part.start,
+						//"end": part.end,
+					};
+					let parts_already_added = false;
+					additions.forEach((add) => {
+						if (typeof part.at !== "undefined") {
+							if (isInRange(part.at, add.start, add.end)) {
+								// at single frequency
+								add_power(add, p);
+							}
+						} else {
+							// frequeny range
+							if ((add.start == part.start) && (add.end == part.end)) {
+								// ranges are the same
+								add_power(add, p);
+							} else if (isInRange(part.start, add.start, add.end) && isInRange(part.end, add.start, add.end)) {
+								// range of part is inside of range of add
+								add_power(add, p);
+							} else {
+								// part range is split by add range
+								if (isInRange(add.start, part.start, part.end)) {
+									// part range starts below add range
+									let p_clone = structuredClone(p);
+									let start = add.start;
+									let end = part.end < add.end ? part.end : add.end;
+									p_clone["frequency"] = start + '\u2013' + end;
+									add_power(add, p_clone);
+									tdata.push(p_clone);
+									parts_already_added = true;
+								} else if (isInRange(add.end, part.start, part.end)) {
+									// add range starts below part range
+									let p_clone = structuredClone(p);
+									let start = part.start;
+									let end = add.end;
+									p_clone["frequency"] = start + '\u2013' + end;
+									add_power(add, p_clone);
+									tdata.push(p_clone);
+									parts_already_added = true;
+								}
+							}
 						}
-						table.download(
-							"pdf",
-							path.basename(document.getElementById('sel_plan').value, '.yml') + '.pdf',
-							{ orientation:"portrait" },
-							download_range);
 					});
+					if (!parts_already_added) {
+						tdata.push(p);
+					}
+					parts_already_added = false;
+				});
+			});
 
-						table.on("tableBuilt", () => {
-							var div_togglebuttons = document.getElementById("togglebuttons");
-							div_togglebuttons.innerHTML = "<span>Toggle column:</span>";
-							table.getColumns().forEach((col) => {
-								let col_name = col.getField();
-								let b = document.createElement("button");
-								b.innerText = col_name;
-								b.addEventListener("click", () => {
-									table.toggleColumn(col_name);
-								});
-								div_togglebuttons.appendChild(b);
-							});
-						});
-						document.getElementById("error").innerText = "";
+			// require in tabular-tables
+			// eslint-disable-next-line no-undef
+			var table = new Tabulator("#data-table", {
+				layout: "fitDataTable",
+				initialSort: [
+					{column: "frequency", dir: "asc"},
+					{column: "band", dir: "desc"},
+				],
+				selectableRows: true,
+				data: tdata,
+				columns: [
+					// eslint-disable-next-line no-unused-vars
+					{title: "band", field: "band", headerFilter: "input", sorter: function(a, b, aRow, bRow, column, dir, sorterParams){
+						return parseFloat(new Measures().from(a).to('m')) - parseFloat(new Measures().from(b).to('m'));
+					}},
+					{title: "frequency/kHz", field: "frequency", sorter: "number", headerFilter: "input", headerFilterFunc: filter_with_not},
+					{title: "bandwidth/Hz", field: "bandwidth", headerFilter: "input", headerFilterFunc: filter_with_not},
+					{title: "mode", field: "mode", headerFilter: "input", headerFilterFunc: filter_with_not},
+					//{title: "band_start", field: "band_start", headerFilter: "input"},
+					//{title: "band_end", field: "band_end", headerFilter: "input"},
+					{title: "description", field: "description", headerFilter: "input", headerFilterFunc: filter_with_not},
+					{title: "power_a", field: "power_a", headerFilter: "input", headerFilterFunc: filter_with_not},
+					{title: "power_e", field: "power_e", headerFilter: "input", headerFilterFunc: filter_with_not},
+					{title: "power_n", field: "power_n", headerFilter: "input", headerFilterFunc: filter_with_not},
+				],
+			});
+
+			document.getElementById("download").addEventListener("click", () => {
+				let download_range = "all";
+				if (table.getSelectedRows().length > 0) {
+					download_range = "selected";
+				}
+				table.download(
+					"pdf",
+					path.basename(document.getElementById('base_plan').value, '.yml') + '.pdf',
+					{ orientation:"portrait" },
+					download_range);
+			});
+
+			table.on("tableBuilt", () => {
+				var div_togglebuttons = document.getElementById("togglebuttons");
+				div_togglebuttons.innerHTML = "<span>Toggle column:</span>";
+				table.getColumns().forEach((col) => {
+					let col_name = col.getField();
+					let b = document.createElement("button");
+					b.innerText = col_name;
+					b.addEventListener("click", () => {
+						table.toggleColumn(col_name);
+					});
+					div_togglebuttons.appendChild(b);
+				});
+			});
+			document.getElementById("error").innerText = "";
+		}
+
+		function update_plan() {
+			Promise.all([
+				fetch(document.getElementById('base_plan').value, {	mode: 'cors' }),
+				fetch(document.getElementById('additions_plan').value, {	mode: 'cors' }),
+			]).then((res) => {
+				res.forEach((r) => {
+					if (!r.ok) {
+						throw new Error(r.status);
+					}
+				});
+				Promise.all([res[0].text(), res[1].text()]).then((d) => {
+					try {
+						update_table(yaml.load(d[0]),yaml.load(d[1]));
 					} catch (e) {
 						display_error(e);
 					}
+				}).catch((e) => {
+					display_error(e);
+				});
 			}).catch((e) => {
 				display_error(e);
 			});
@@ -168,8 +251,14 @@ div#togglebuttons>button {
 		}
 	</script>
 	<div>
-		<label>Plan:
-			<input name="plan" id="sel_plan" type="text" value="band-plan-iaru_r1_hf.yml">
+		<label>Base Plan:
+			<input name="plan" id="base_plan" type="text" value="band-plan-iaru_r1_hf.yml">
+		</label>
+		<button onclick="update_plan()">Change plan</button>
+	</div>
+	<div>
+		<label>Additions:
+			<input name="plan" id="additions_plan" type="text" value="band-plan-de.yml">
 		</label>
 		<button onclick="update_plan()">Change plan</button>
 	</div>