Signs on the Horizons

One of the best known Qur’anic verses related to navigation is 41:35, “We shall show them Our signs upon the horizons and within themselves, until it be clear to them that He is the Real” (the change of grammatical person: “Our signs"/“He is”, is a typical Qur’anic figure (iltifāt), as if emphasizing that the “person” is always the One and Only).

As we have seen in recent posts, and as is made obvious in the design of the wind rose, the nautical rhumbs establish a direct relation between the central subject, i.e. the pilot or the vessel itself, and the peripheral object deployed in 360 degrees of possibility, divided in a conventional number of directions, 4, 8, 16, 32, 64. Seen on the two-dimensional pattern, as seen from a stationary position, the horizon is the utmost limit, the non plus ultra. The natural state of the landlubber is this beyond-less confinement, where the signs on the horizon are informative, recreational, interesting, even fascinating.

But there are the travellers, those who move on. And there are the astronomers, the true astrologers who have intimate knowledge of the movement of the cosmos, of the law of movement, whereby mighty lights rise from the horizon, run their course, and set, inexorably.

For such pilots and knowers of the spheres, the signs are an existential reality, a living knowledge: “beyond” and “self” merged, the horizons are not a limit, but a stage of the journey—onward they sail, guided without error by the stars whose love is in their heart. For them, in their journey Home, the horizons from within themselves reverberate encircling one another, circle upon circle upon circle… [JA]

Nautical Melothesia

Melothesia is not a word you encounter every day at the supermarket, and yet it names an idea that never ceased to accompany civilization until the advent of our modernity. Straight from the Greek μελοθεσία, the “assignment of parts” or the “apportioning of limbs”, it refers to the vital correspondence between the parts of the human body and the divisions of the sky; it is the immemorial macrocosm-microcosm doctrine, and one of the applications of the Emerald Tablet’s famous opening sentence: “As above, so below.” There are famous images about it across cultures, most known to us as one or other kind of “Zodiac Man” image, the homo signorum.

One of the best known depictions of melothesia,
from the Très Riches Heures du duc de Berry, 15th c.

Melothesia was not limited to correspondence of the body with the duodecimal solar zodiac signs. There was also a nakshatra-purusha in Indian tradition, the “Lunar Stations Man”, i.e. based on the lunar zodiac division of 27/28 divisions; and other cultures had analogous correspondences based on different divisions.

27 lunar stations on the body of Vishnu.

Melothesia was generally associated with medicine, martial arts, music… but in early modern Arab navigation we also have a fascinating analogue and a true nautical melothesia based on the division of the horizon in 32 rhumbs. The basic practice, details of which we will be reading about during the coming weeks, is that the ship, instead of the body, is virtually divided in 32 “directions” projected from the compass card, as if the wind rose were projected around the ship’s deck. For example, if we assign the north to the bow, then the stern will correspond to the south. This way, the parts of the vessel are mapped onto the directions, and by focusing on a part of the vessel, a certain destination will be reached.

This strictly practical application of the immemorial macrocosm-microcosm doctrine illustrates the better-known astrological and alchemical doctrines making them more concretely understandable. In fact, it seems to echo the astrological adage: “character is destiny,” which then, put in navigation terms, might be: “The disposition of your rhumbs will determine your destination.” Destiny–Destination, perhaps just one among many pairs of crucial terms of ancient cosmologies which are illuminated by an unbiased study of medieval technoscience. [JA]

The Ever-Unseen Scientific Certainty

We had had occasion, with one of the lunar mansions, to discuss the paradoxical importance of weaker stars and asterisms. Now, last week our reading had to do with the importance of the two poles (qutbayn) and their related stars: Polaris (al-Jāh) in the first place, but mentioning also Errai (γ Cephei) and, near the South Pole, the Magellanic Clouds. Ibn Mājid gives several ways of ascertaining the location of the poles using combinations of pointers, and then he observes,

The Pole is not with a given star, but it is a black space between east and west, which is ascertained with the astrolabe and the lodestone.

He goes on about this idea, and somewhere else in the text he says the Pole “is not clothed” or “wrapped” with any star. This fact is of course at the basis of the crucial technical concept of Polar Star calibration (bāshī), which was so important in Indian Ocean nautical sources; the need to know exactly the relation between Polaris and the Pole at any given time.

It is almost a truism to speak of the immobility of the centre of motion, like a wheel hub—it is after all the Aristotelian motor immobilis—and it is a given of any axis of movement. But this immobility does not require the invisibility of the axis, that it be somehow “imperceptible”, only within grasp of the mind’s eye, through reasoning and contemplation. This is exactly like the nature of all the celestial circles in an armillary sphere. It might be tempting to call them “figments of the imagination”, when in reality they are truths recognized by the imaginative faculty.

How many certain routes traced, and how many bright and prominent events accurately anticipated, all on the basis of these invisible polar certainties! Beyond simplistic stereotypes of “science vs intuition”, and beyond the media-fed storyline of science as the summit of exactitude, it is strikingly obvious here, as in other similar instances, that science has always been not only at ease with uncertainty and with opaqueness, but rooted in it. The scientist, like a sailor in the night, is at home with indetermination, again and again. Good to remember in these uncharted times, and quite in line with Hesse’s verse,

Wahrlich, keiner ist weise,
Der nicht das Dunkel kennt.
“Truly, no one is wise
Who does not know darkness.”
[JA]

Us vs. Them: Early Modern Nautical Othering

Reading through the initial pages of chapter 4 of the Fawā’id, we came last week across a remarkable passage on Mediterranean/European vs. Indian Ocean/Arabic nautical techniques. The Westerners are in fact called here by Ibn Mājid “the people of the Egyptian abodes”:

…they have the compass, and in it they have lines, and marks for miles, and their rhumbs are only sixteen… We use thirty-two rhumbs… and they are incapable of understanding our level of attainment, whereas we do reach as far as their knowledge goes and we can sail their ships, for the Indian Ocean is connected to the Atlantic Ocean (al-Bahr al-Muhīt), and it has a knowledge recorded in writings and stellar altitude measures…

Leaving aside other technical details for a future occasion, let us focus on these final lines, where we find one striking assertion and one subtly insightful statement.

The first one is striking if we consider that Ibn Mājid is writing this probably in the 1490s, just as the Portuguese started rounding the Cape (Bartolomeu Dias, 1488), and yet he takes as a given the connection of the two oceans. This is no novelty if we remember that al-Birūnī (11th century), already spoke clearly of this connection with al-Bahr al-Muhīt. Literally the Circumambient, or All-Encompassing Sea, this was the most frequent Arabic name for the Atlantic—while still carrying echoes of the archaic notion of a Universal Surrounding body of water, what the Greeks called Okeanos. We wonder anyway, had Ibn Mājid also had news of the Dias expedition?

Sebastian Münster 1554 map

The second statement is this idea that there was a written body of Indian Ocean nautical science, and that it was this, combined with a certain knowledge of astronavigation, which gave Arab sailors the edge over those “Egyptians”. We have by now got used to Ibn Mājid boasting about his own writings, but here it does certainly sound as if he is referring also to a traditional, well known, nautical corpus. Of these possibly lost writings we have, alas, only the faintest traces left in medieval Arabic literature… what a sunken Atlantis of maritime treasures! [JA]

Between Heaven and a Vast Place

Just a pause for thought as we prepare to start a new chapter of the Fawā’id. Last week we completed the longest chapter, on the twenty-eight lunar stations (manāzil al-qamar), and now we move on to a chapter on the thirty-two stellar rhumbs (akhnān). We shall soon have occasion to go into more detail regarding the rhumbs, but for now it may be useful to consider the connections between the two topics.

The path of the lunar stations goes roughly along the inclined red line. The 32 stellar rhumbs are laid out on the horizontal of the equator, one rhumb each 11 1/4°.

The system of lunar stations is—schematically—an equal division of the sky. The system of stellar rhumbs is an equal division of the entire circle of the horizon, based—schematically—on the rising points of a set of sixteen stars. In theory, their rising points and their diametrical opposites define the compass points. Interestingly, in the Mediterranean, the same division of thirty-two compass points was “based” on the winds, and there were quite complex names of the winds!

So we have one “vertical”, or at least celestial, positioning system, and one horizontal system. Between them, as if availing himself of the possibilities of this conjunction, is the master pilot, a tiny dot with his vessel in the middle of the ocean: so small and insignificant, and yet, thanks to his knowledge (scientia), in command of the situation, following an invisible path through the deep water. Stay tuned for many more details over the coming weeks, digging into the facets and subtleties of the knowledge and practice of the stellar rhumbs. [JA]

Forms of Knowledge in the Heart

From our reading last week, this is how Ibn Mājid speaks of the purpose of his astronomical descriptions and teachings,

…for the discerning pilot to find his way through the expanse and the compact of the heavenly spheres… to advance to the ultimate degree and thus picture the sciences in his heart; and to comprehend the turning and dimensions of the spheres through the stars as they rise and set.

The original of this curious “picturing the sciences in the heart” is well worth a closer look. It may be said that the Arabic wording, yusawwiru al-‘ulūm fī qalbihi, is medieval epistemology in a nutshell, particularly in relation to technoscientific knowledge. In describing an accomplished pilot and the perfection of his art, this formula has three components: 1–an object, what is acquired or obtained, al-‘ulūm—plural of ‘ilm, knowledge, often translated as “sciences” or “techniques”; 2–a manner of acquisition, or a process, the verb yusawwiru—a root (s-w-r) we had found used for the “shapes” of constellations, and which has to do with forms, and in particular the Platonic ideas/forms/shapes (suwar aflatuniyyah); 3–a recipient or container for the knowledge acquired, qalb—the “heart” as a centre of consciousness sometimes distinct and sometimes overlapping with ‘aql, “intelect” or “mind”.

So, let’s for now leave aside the first component, and let’s unpack the formula by making explicit some of its implicit nuances. First, like those brilliant shapes in the night sky, the Platonic ideas, or objects of real knowledge, had acquired in Arabic a certain tridimensionality; the root s-w-r has to do with sculpture and pottery: the “ideas” were more like bodies of concrete knowledge. Second, their locus was not so much a breath-like, airy subtance like spiritus, ruh, anima, etc., or an abstract ethereal intellectus or mens, but the liquid/solid fixed centre of the body and the seat of vitality, the heart.

I think we might now rephrase and appropriately paraphrase Ibn Mājid’s formula: “the ultimate degree of your craft is when the knowledges acquired take shape like concrete constellations in the life-giving centre of your existence.” It may sound a bit grandiose, but it does express quite well something that takes place in the day-to-day practice of artisans everywhere: embodied knowledge is not just in the muscles and tendons that know the habitual movements, but also deep down in a central locus from where springs (like blood) the existential knowing joy of a work well made. [JA]

Sewing Paterns in the Sky

In the beginning of this journey through Kitāb al-Fawā’id, we dedicated one of our very first posts to the idea of mimesis. We were reading about navigation history in the first fā’idah, and about how Noah’s ark resembled the Big Dipper. Now, nearly two chapters later, this same idea reappears in relation to the 26th and 27th lunar mansions, al-far‘ān.

In ancient Bedouin tradition, the stars of the great square of Pegasus were imagined to be the upper open end of a well bucket, from which water would be poured. Seen in the night sky, its shape resembles a square where two parallel sides—one southern, the other northern—are the two lunar mansions called al-far‘ān.

However, neither Ibn Mājid nor Indian craftsmanship considered the four stars to form a perfect square. In fact, the difference between the lengths of the southern and northern sides was a crucial one, for it was the pattern upon which were cut the leech (al-dāmān) and the luff (al-jūsh) of a ship’s sail. Following Ibn Mājid, in Indian traditional craft, such a proportional resemblance was no coincidence. The cutting of the sails (tafsīl) was taken directly from the relative positions of these stars—that is, from the lines imagined in al-far‘ān or the great square of Pegasus. [IB]

New Years and Monthless Years

Very aptly, and according to plan, we restarted our reading group last Wednesday with the final session devoted to al-Mahrī’s Qilādah. As far as we are aware, it must be the first time that any shared Western academic initiative has focused on this work in particular, and perhaps even on any work by al-Mahrī. We are grateful to our colleagues in London, Berlin, Leipzig and Abu Dhabi for joining us.

I say very aptly because, as mentioned before, this little treatise is all about the beginning of the year in different calendars, thus about the relations between different calendar eras, and thus about the ever-baffling relations between the paths of sun and moon. To a certain extent it echoes the concerns of computists in medieval Europe for the calculation of the epact.

More specifically, the Qilādat al-shumūs, written by a Muslim pilot, addresses the crucial question of how to reconcile the lunar calendar with the various solar calendars in usage around the Indian Ocean in the late Middle Ages. It was not a theoretical concern, but the very practical one of ascertaining sailing seasons in a region where postponing a departure a few days might have lead to months of delay.

There is one insight from this latest session which has stayed with me after a few days: for most calendrical calculations described, it was necessary to be aware of the number of days elapsed from the first day of the solar year (mā dakhala min al-sanah). This is not unlike the financial “year to date” count, and what in specialised algorithms is nowadays called the dayno. January 11 is simply Day 11, February 1 is Day 32, and March 1 would be Day 60 (i.e. 31+28+1, unless it’s a leap year!) and so on and so forth.

This way of counting the days of the solar year is eminently practical and, remarkably, it does away cleanly with all the layers of mythical and lunar divisions which seem so inseparable from the calendar. It is like stripping the calendar bare and leaving a pure clean sequence of numbers, from 1 to 365. Aniconic, straightforward, arithmetical, almost iconoclastic: what could be more practical?

Calculation table from Wikipedia.

I wonder if knowing that you were born on the 69th day of the year is of any use at all, or a mere idle curiosity. But when a pilot knew that a certain asterism rose in the morning on the 100th day of the year, he knew unequivocally where this fitted within the cycle of the seasons, and where he was within the rhythm of the monsoons and other seasonal winds.

So let’s get ready and practise: What day of the year were you born, sailor? Don’t give me a date, but what is your birthday’s dayno? [JA]