When the echo sounder goes blank or the chartplotter loses its fix, the depth under your keel stops being a number on a screen and becomes a question. Sailors answered that question for centuries with a lead line, and a hand lead kept aboard still earns its place on any Kuwaiti boat.
A lead line is a weighted line used to measure depth directly. A lead weight sits at the end of a marked cord; you lower it to the seabed and read the depth from the marks. The base of a traditional lead was hollowed and packed with tallow or soft soap so the seabed left a sample: clean sand, sticky silt, or almost nothing, which told you hard ground.
Five to twenty metres of line covers shallow inshore work around Kuwait Bay. Mark it clearly and permanently. Knots and tags survive salt, sun, and wet hands; ink or glue-only markings do not. Make each mark easy to tell apart at a glance, and check the whole line for chafe and rot before every season.
Bring the boat to a near stop, or barely making way. Stand clear of anything the line can catch on, put one hand on the rail for balance, and lower the lead on the up-current side so the line streams away from the hull instead of under it.
Read the nearest mark the moment the lead touches down, and say the depth with its unit. Then look at the tallow. Sand leaves a clean, gritty sample and usually means good holding; silt is soft and warns of poor ground; rock or hard ground leaves the tallow almost clean. Approaching Kuwait Bay and the shallow inshore areas, that sample is often worth more than the number alone. The B7R app's fish guide and seasons notes help you plan the trip, but on the water the lead tells you what is directly under the keel.
A lead line only reaches shallow water; past a few dozen metres it is slow and inaccurate, and running fast makes it useless and dangerous. Treat it as a backup, not a replacement. Pair every sounding with tide knowledge: note the state of the tide and correct your reading so you know the true depth, not just what the line finds. Tide times for Shuwaikh and Shuaiba ports are part of that check.
B7R puts tide times for Shuwaikh and Shuaiba ports, sea state, a fish guide, a catch log, seasons, navigation tools, and an emergency SOS button in one free app on Google Play. Keep it as your primary reference and keep a lead line aboard as the backup. Download it here: https://play.google.com/store/apps/details?id=com.q8dm.b7r