We are currently proceeding up the Rhine around km 660, and anchoring conditions are trickier than anticipated. The water level is exceptionally low, so all the protected inlets where small craft might find respite from the current are dried out, as are the spaces between all the protection walls that stick out into the river. To make matters worse, most marinas now have less water than our 1.5m draft, so anchoring is not just a fun learning opportunity, but ever so slightly necessary.
All anchoring attempts so far on the Rhine have been entirely unsuccesful. The low water level means that I only make it a couple of boat lengths away from the fairway before I'm in 2m of water, at which point I have about a foot and a half of underkeel clearance. The bottom is typically coarse gravel to fist sized rocks, and the slackets currents I can find are 2.5 knots. Dropping my 50kg JIS and 10-20m of 13mm chain (100 lbs / 30-60ft / 1/2") under those conditions typically results in dragging at about one knot.
So far, I have attempted to anchor just below bends on the inside, on the basis that this is where I find the slowest currents and the flattest bottoms with the finest particles. Still, this means less than ideal conditions. I have noticed that most "liegstelle" (literally resting places) are on the outside of the meanders rather than the slower flowing insides, and theorize that this is because the big guys (ships >400ft) like to tie off to bollards and kedge off with their bow anchors, in which situation the steeper bank actually works to their advantage. Still, I'm very unsure about my theory, and would love a good source on river anchorage theory.
All my searching has yielded so far is geared towards anglers with small craft, and doesn't really apply to me. I met an old river boat captain yesterday (knocked and asked if I could moor alongside for the night as I was getting tired and desperate). He did some rough calculation based on my boat's underwater dimensions (1.5m draft x 3.75m beam) and told me I should be using a 120kg anchor (!) for the Rhine. I have noticed that the barges use anchors with roughly similar shapes to my JIS, but with wider "arrowheads".
Thoughts? Recommendations? Further reading? I'm not quite at my bitter end (heh) but getting there.
All anchoring attempts so far on the Rhine have been entirely unsuccesful. The low water level means that I only make it a couple of boat lengths away from the fairway before I'm in 2m of water, at which point I have about a foot and a half of underkeel clearance. The bottom is typically coarse gravel to fist sized rocks, and the slackets currents I can find are 2.5 knots. Dropping my 50kg JIS and 10-20m of 13mm chain (100 lbs / 30-60ft / 1/2") under those conditions typically results in dragging at about one knot.
So far, I have attempted to anchor just below bends on the inside, on the basis that this is where I find the slowest currents and the flattest bottoms with the finest particles. Still, this means less than ideal conditions. I have noticed that most "liegstelle" (literally resting places) are on the outside of the meanders rather than the slower flowing insides, and theorize that this is because the big guys (ships >400ft) like to tie off to bollards and kedge off with their bow anchors, in which situation the steeper bank actually works to their advantage. Still, I'm very unsure about my theory, and would love a good source on river anchorage theory.
All my searching has yielded so far is geared towards anglers with small craft, and doesn't really apply to me. I met an old river boat captain yesterday (knocked and asked if I could moor alongside for the night as I was getting tired and desperate). He did some rough calculation based on my boat's underwater dimensions (1.5m draft x 3.75m beam) and told me I should be using a 120kg anchor (!) for the Rhine. I have noticed that the barges use anchors with roughly similar shapes to my JIS, but with wider "arrowheads".
Thoughts? Recommendations? Further reading? I'm not quite at my bitter end (heh) but getting there.
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